# Optical Instruments Questions and Answers

Physics
Optical Instruments
Pick one of these negative whole number measurements: -10 cm, -11 cm, -12 cm or -13 cm. It's your choice. This will be your image distance for your converging lens. Your (negative) image distance d1 = You place an object 1.0 cm in height in front of a f = -15 cm diverging lens. An image is produced at your (negative) image distance value.
Physics
Optical Instruments
Light enters a liquid (from air) at an angle of 47° with respect to the normal and is refracted into the liquid at an angle of 24° with respect to the normal. Determine the index of refraction of the liquid.
Physics
Optical Instruments
A camera is equipped with a lens with a focal length of 34 cm. When an object 1.3 m (130 cm) away is being photographed, what is the magnification?
Physics
Optical Instruments
A camera is equipped with a lens with a focal length of 24 cm. When an object 1.1 m (110 cm) away is being photographed, how far from the film should the lens be placed?
Physics
Optical Instruments
Consider an incandescent bulb and a CFL (compact fluorescent light), which are both sources of white light. Describe how light is made by each of these objects. As part of your explanation, make sure you discuss (1) the underlying mechanism for creating the light (2) whether it will make a continuous or discrete spectrum of light, and (3) whether it is best described by a wave model or a photon model.
Physics
Optical Instruments
Place the cubic prism on the whiteboard and shine the green laser at the front face of the cube such that the light leaves the opposite (back) face without hitting either of the sides. Sketch both the incident ray and the ray that leaves the back face of the prism. a) What do you notice about these two rays of light? What, if anything, changes as you change the angle of the incident ray? Describe your observations using both diagrams and words.