A glass cylindrical vessel with base concave mirror of focal

Last updated: 6/7/2023

A glass cylindrical vessel with base concave mirror of focal length 20 cm is filled with two immiscible liquid of refractive index 1 5 and 1 4 Thickness of liquid level are 15 cm and 14 cm respectively A fish is moving vertically upward along principle axis of mirror with speed of 1 cm s A bird is moving along vertically downward direction with 2 cm s A small hole is made at bottom surface of vessel When distance of fish from pole of mirror is 10 cm the rate of liquid level falling is 1 cm s focal length of concave mirror is 20 cm Then at the given instant 1 cm s 14 cm 1 cm s 15 cm 2 cm s u 1 4 u 1 5 Bird E cm s Fish 10 cm f 20 cm A Velocity of image of fish formed after reflection from mirror as seen by bird is 1 cm s alor upward direction B Velocity of image of fish after formed after reflection of mirror as seen by bird is 1 cm s al downward direction C Velocity of image of fish as seen by itself is 5 cm s along downward direction D Velocity of image of fish as seen by itself is 5 cm s along vertically upward direction