Geometrical Optics Questions and Answers

In plane mirror distance of object from mirror is same as distance of image from mirror so Find magnitude of x co ordinate of image O A d 1 Y d I

3 A fish F in the pond is at a depth of 9m from water surface and is moving vertically upwards with velocity 3 ms 1 At the same instant a bird B is at a height of 8 m from water surface and is moving downwards with velocity 3 ms At this instant both are on the same vertical lines as shown in the figure Which of the following statement s is are correct Depth of fish as seen by bird will be 13 m Height of bird as seen by fish will be 14 m Speed of fish as seen by bird will be 5 m s Speed of bird as seen by fish will be 7 5 m s

A point object performs SHM about mean position x 25 cm in front of a concave mirror of focal length 10 cm Position of particle about mean position is given x 5sin 9t in cm to 25 cm What is the difference between maximum and minimum distance of image from mirror in cm

What is the magnification of a particular lens when an object is placed at 46 cm and the image is produced at 18 cm Remember the d in your equation applies to ANY image distance Your answer may be negative Round your answer to the nearest 0 01 Do not add units

What is the focal length if the object distance is 5 1 m and the image distance is 1 9 m Round your answer to the nearest 0 1 Do not add units

An apple is placed 19 6 cm from a convex lens with a focal length of 15 cm A 8 2 cm tall image is produced at 36 2 cm How tall is the apple Round your answer to the nearest 0 1 Do not add units

35 A spherical mirror has a radius of curvature of 14 cm What type of mirror could it be concave or convex spherical mirror concave spherical mirror only convex spherical mirror only

34 A ray in glass arrives at the glass water interface at an angle of 48 with the normal The refracted ray in water makes a 61 angle with the normal The index of refraction of water is 1 33 Then the r glass is redirected so its new angle of incidence is 25 What is the angle of refraction in the water O 60 54 62 58 30 water n 1 33 glass 48 61

33 An object is placed to the left of a thin diverging lens of focal length 8 0 cm The image of the object is upright and 0 33 times the actual height What is the distance of the object to the lens 6 0 cm 16 cm 7 5 cm 12 cm

able to 22 The critical angle for total internal reflection at a turpentine air interface is 42 8 A ray traveling in the liquid has an angle of incidence of 32 0 at the interface What angle does the refracted ray in air make with the normal 53 0 14 7 51 3 23 8

1 A 3 0 cm tall object is placed in front of a convex mirror with a focal length of 5 0 cm A If the object is 7 0 cm in front of the mirror what is the position of the image B What is the height of the image

sunken chest 911 3 3m Air ng 1 00 y 1 33 Chest 2 0m 2 If 02 31 2 at what angle of incidence 0 should the light be aimed 3 Calculate the critical angle for a bearn of light passing from AIR into WATER

1 Light reflected at 55 6 degrees from a window is completely polarized What is the window s index of refraction and the likely substance of which it is made 2 At what angle is light inside crown glass completely polarized when reflected from water as in a fish tank

5 What will happen to the incident light rays in water if with an angle of incidence is LESS than the critical angle will be select best option b partially reflected and partially transmitted d totally transmitted a absorbed c totally reflected

15 A bottle 5 89 cm tall is 56 2 cm to the left of a plane mirror Where is the image formed O O O O 56 2 cm to the right of the mirror 9 54 cm to the left of the mirror 9 54 cm to the right of the mirror 562 cm to the left of the mirror

5 A person is having trouble seeing Bifocals should be prescribed for him His far point the farthest distance he can see clearly is 65 0 cm What power lens in diopters should be prescribed to allow him to see things that are very far away His near point is 53 0 cm What power lens is needed for him to see objects 25 cm away

6 A thin layer of water is on top of a sheet of glass The glass rests on a sample of sapphire A ray of light is incident on the water from air at an angle of 21 5 from the normal What is the angle of refraction in the sapphire Indices of refraction air 1 00 water 1 33 glass 1 52 sapphire 1 77 Air Water Glass

When light strikes the surface of a lake it slows down some of its energy is reflected some is refracted and some might be absorbed by the surface of the water As a result the angle of incidence will be the angel of refraction O equal to greater less than

3F 2 3 2F F Lens becomes Select F 2F Optical Axis An object is placed at position 1 and slowly moved toward the lens The image begins as Select then the object approaches the focal point m 3F as

A laser beam is aimed at the smooth surface of a lake Which organisms will be illuminated by the light Choose all that apply Air Smooth calm pond 0 Bird Laser Seaweed Fish Crab Normal Fish M Seaweed Bird

1 Is the critical angle greater for green light or blue light What does this tell you of to refraction 2 What is the critical angle for the light emerging from glass into air 3 When you are looking through an aquarium at the fish is the fish as close as it appears Explain by using ray diagram References 1 R Kezerashvili College Physics Laboratory experiments Electricity MAGNETISM Optics Gurami Published New York 2003 2 Instruction Manual and Experiment Guide for the PASCO scientific Model OS 8515 BASIC OPTICS

A light ray strikes a mirror at 34 What is the ray s angle of reflection Do not add units to your answer

If light moves through a particular material at 1 9x108 m s what is the material s refractive index n Use the equation in your notes Round your answer to the nearest 0 01

3 A minnor of focal length 0 5 has an expect in event at 1 meter distance Where will the image be 0 33 meters behind the mirror 100 meter behind the mirror 0 33 meters in front of the mirror Imeter in front of the mirror D 9 As ATTO You walk away from a flat mirror cohat is true your image in the mirron it from mirror Stays the same size and distance away from the m get bigger and move further away it Shrinks and moves further away from mirror it stays the same size and moves further away from th Which rules apply to concave mirror pay tracing Click an incident ray travels Parallel to the Primcipal axis way to curved mirror the pay will be reflected back thre the focal point to the Te an incident may travels the focal point on the way to the Cu Mirror the may will be reflected back Parallel to the principal a travel towards the focal poine on the way 5 the Curved mirror the ray will be reflected back parand to ancpal axis If an inadent ray I an incident pay travels Parallel to the Prinpal axis on the

3 Draw the images in the following plane or curved mirrors 1 2 ic

The index of refraction of bone is n 1 55 What is the speed of light in bone

mirror with radius of curvature 0 5 meters has an object placed o 1 meters in front of it Where would the image be located 0 5 meters 0 17 meters 0 1 0 17moters 2 If an object is placed a distance 0 3 meters away Curved mirror and resulting image has a magnification C What can you say about the mirror it is diffuse Fit is concave it is convex it is flat 0 7 3 If an object is placed 0 5meters from curved mirror c image has a magnifaction of what is the C image 0 5m 0 7m 0 35m 0 5m 4 An image is formed by a minpor has a magnificatic

Which principle does ray 3 demonstrate a A ray parallel to the principal axis will pass through F b A ray that passes through the principal axis will reflect through F c A ray perpendicular to the principal axis will pass through F d A ray that passes through F will reflect parallel to the principal axir

Where will the image of this object be located C a between F and C b at F Oc between F and V d at C

The image in this mirror will be V F a upright larger than the original and virtual b upright smaller than the original and virtual Oc inverted smaller than the original and virtual d upright smaller than the original and real

The image produced in the lens above will be smaller larger Between F and 2F At 2F Beyond 2F same size in front of the lens inverted

Can produce both real images and virtual images Only produces images that are virtual Converging lens Only produces images that are smaller Identify all the descriptions that define a convex lens and the images formed by a convex lens Can produce images that are inverted Diverging Lens Can produce real images

A beam of light traveling in air has an angle of incidence of 29 0 when it enters a medium which has an index of refraction of 1 51 What is the angle of refraction of the beam inside the medium

5 Problem 9 Consider light passing from air into water n Medium Gasses at 0 C 1 atm Air Carbon dioxide Hydrogen Oxygen Liquids at 20 C Medium Solids at 20 C 1 000293 Diamond 1 00045 Fluorite 1 000139 Glass crown 1 000271 Glass flint Ice at 0 C Benzene 1 501 Carbon disulfide 1 628 Carbon tetrachloride 1 461 Ethanol Water fresh Glycerine 1 361 1 333 1 473 n 2 419 1 434 1 52 1 66 1 309 Polystyrene Sodium chloride 1 49 1 544 Quartz crystalline 1 544 Quartz fused 1 458 Zircon 1 923

An object is 13 1 cm tall and is located 25 0 cm to the left of a concave spherical mirror with a focal length of 35 0 cm The image is found to be 87 5 cm to the right of the spherical mirror How tall is the image and is it upright or inverted Select one O a O b O C O d 3 74 cm Upright 45 9 cm Upright 3 74 cm Inverted 45 9 cm Inverted

A concave mirror has a focal length of 63 0 cm It produces an image that is located 242 3 cm behind the mirror Where is the object located relative to the mirror Select one O a 50 0 cm behind the mirror 85 1 cm behind the mirror 50 0 cm in front of the mirror Od 85 1 cm in front of the mirror O b O C

An object is 3 45 cm tall and is standing upright a distance of 24 0 cm in front of a convex mirror The image formed is found to be behind the mirror at a distance of 13 7 cm and is upright with a height of 1 97 cm What is the focal length of the convex mirror Select one O a O b O C O d 4 59 cm 31 9 cm 0 0313 cm 0 2178 cm

A candle is 8 cm high If the object distance is do 8 6 cm and the image distance is di 17 3 cm how tall is the image Remember negatives matter Be very careful hi he d do Round your answer to the nearest 0 1 Do not add units

IT 3F 4 01 2F 5 Lens TTTT F 2F Where could you place an object so that the image would be real and inverted Choose all that apply Optical Axis T 3F

E 4 3 5 1 Where could you place an object so that the image produced would be the same size as the object Choose all that apply 2 Lens 2F TTT Optical Axis 3F

A 15 3 cm tall flower is placed 23 8 cm from a convex lens with a focal length of 15 cm An image is produced at 63 7 cm How tall is the image Remember negatives matter Be very careful ho d do Round your answer to the nearest 0 1 Do not add units

10 The index of refraction of bone is n 1 55 What is the speed of light in bone 10 points

19 5 pts A lava light is placed 35 inches from a convex lens with a foca image of the lamp forms on a screen placed on the opposite side of the lens a Draw a qualitatively correct ray diagram for this scenario that clearly indicates where the 2 5 image is formed b Is the image upright or inverted Real or virtual b Calculate the image distance and magnification p t 0 5 46 6 10 I SEP 20 35 33 235714286V x 003 0285714286 02142857140 73 M 1 35 Z 46 666 666 93 G4 74 9 C X

Based on what you ve learned about reflection from a plane mirror is the reflection shown in each of the 2 given pictures the result of plane mirror reflection or not Justify your answers Picture 1 Picture 2

A 10 0 cm tall object is placed 6 00 cm in front of a curved mirror and produces an image 2 00 cm behind the mirror What is the focal length of the mirror O 3 00 cm 1 50 cm 0 667 cm 0 333 cm

A ray of light strikes a mirror at an angle of 33 to the normal What is the angle of reflection Answer in units of Answer in units of circ part 2 of 2 What is the angle between the incident ray and the reflected ray Answer in units of Yo

2 1 cau tal cardie flamme is 2 0 m from a wall You happen have a lens with a focal length of 27 cm Part A How many places can you put the lens to form a well focused image of the candle flame on the wall N 2 places subint Correct Part B Previous Answers For each location what is the height of the image Express your answers using two significant figures Enter your answers numerically separated by a comma Submit VAE 1 5 8 Previous Ansanrs Request Ansat cm

virtual image What number case describes the image created by the eyepiece below Is it a real or virtual image Object very distant h 00 Objective fo F Fo fo h 0 Eyepiece

In the figure a light ray in air is incident on a flat layer of material 2 that has an index of refraction n 2 6 Beneath material 2 is material 3 with an index of refraction n3 The ray is incident on the air material 2 interface at the Brewster angle for that interface The ray of light refracted into material 3 happens to be incident on the material 2 material 3 interface at the Brewster angle for that interface What is the value of n3 8 Air 112 115

If light moves through a particular material at 1 5x108 m s what is the material s refractive index n Use the equation in your notes Round your answer to the nearest 0 01