7th Grade Physics Test: Light – Reflection and
Refraction
Grade: 7
Time: 45 minutes
Total Marks: 40
Section A: Multiple Choice Questions (1 mark each)
1. Which of the following is true about the angle of incidence and angle of reflection?
a) They are always equal
b) They are always different
c) They depend on the color of light
d) They depend on the surface material
2. The phenomenon of bending of light when it passes from one medium to another is called:
a) Reflection
b) Refraction
c) Dispersion
d) Diffraction
3. When light travels from air into water, it:
a) Speeds up
b) Slows down
c) Maintains the same speed
d) Stops
4. A plane mirror forms an image that is:
a) Real and inverted
b) Virtual and upright
c) Real and upright
d) Virtual and inverted
Section B: Fill in the blanks (1 mark each)
5. The angle between the incident ray and the normal is called __________.
6. The speed of light is __________ in vacuum compared to any other medium.
7. The bending of light towards the normal occurs when light enters a __________ medium.
8. The image formed by a plane mirror is __________ in size compared to the object.
Section C: Short Answer Questions (3 marks each)
9. State the laws of reflection.
10. Why does a pencil appear bent when placed in a glass of water?
11. Draw a ray diagram showing refraction of light from air to glass. (Use the space below)
Section D: Long Answer Question (5 marks)
12. Explain with a diagram how light bends when it passes from air into water. Why does this happen?
Bonus Question (2 marks)
What is the refractive index of a medium? How is it related to the speed of light in that medium?