1. A plane glass plate is placed over various coloured letters. The letters which appears to be raised least
1) yellow 2) red 3) green 4) violet
Ans: (2)
2. The hunter desires to shoot a fish whose image could be seen through clear water. His aim should be
1) Above the apparent image of fish
2) Below the apparent image of fish
3) In the line of sight of fish
4) Parallel to line of sight of fish
Ans: (2)
3. A bird in air is at a height 'y' from the surface of water. A fish is at a depth of 'x' below the surface of water. The refractive index of water is μ. The apparent depth of fish from the bird is
Ans: (3)
4. A small air bubble is inside a transparent solid cube at exact centre. If 'a' is side length of the cube and μ is its refractive index, the apparent distance of air bubble from any face of the cube is
Ans: (1)
1) 18 cm 2) 2 cm 3) 15 cm 4) 12 cm
Ans: (3)
6. A point object is located at a point in a glass slab as shown in figure. The distance of the object as measured by an 
observer at P will be (μ = 1.5)
1) 7.0 cm 2) 6.0 cm 3) 5.0 cm 4) 7.5 cm
Ans: (2)
7. A ray of light is incident at an angle of 60° with the normal to a 
cm thick plate (μ = ). The shift in path of the ray as it emerges out from the plate is
1) 1.2 cm 2) 1.8 cm 3) 0.5 cm 4) 1 cm
Ans: (4)
8. A mark at the bottom of a liquid appears to rise by 0.1 m. The depth of the liquid is 1 m. The refractive index of the liquid is
Ans: (2)
9. A vessel of depth 'd' filled with a liquid of refractive index μ1 , upto half of its depth and the remaining space is filled with a liquid of refractive index μ2. The apparent depth while seeing normal to the free surface of the liquid is
Ans: (3)
10. A microscope is focussed on a ink dot on a white paper. A galss slab of thickness 0.03 m with μ = 1.5 is placed on the paper. To focus the ink dot clearly the microscope must be
1) raised by 0.02 m 2) lowered by 0.02 m 3) raised by 0.01 m 4) lowered by 0.01 m
Ans: (3)
