Physics Practice: Light Energy (Mock Test 3 - Advanced)
1. If a ray of light is incident on a plane mirror such that it makes an angle of $30^\circ$ with the mirror surface, the angle of reflection is:
2. Two plane mirrors are placed parallel to each other. A candle is placed between them. The number of images seen will be:
3. A secondary source of light is an object that:
4. The "Glancing Angle" of incidence is the angle between:
5. Which of the following is true for the image formed by a plane mirror?
6. If two plane mirrors are kept at an angle of $60^\circ$, the number of images formed is:
7. A periscope works on the principle of ________ reflection(s).
8. When white light passes through a prism, it splits into its constituent colors. This is called:
9. Which of these is a non-luminous body?
10. Why can't we see a clear image of our face in a piece of paper?
11. The angle of deviation ($d$) for a plane mirror is related to the angle of incidence ($i$) by:
12. An object is moving towards a plane mirror at $2 \text{ m/s}$. The speed of the image relative to the object is:
13. In a plane mirror, if the object is real, the image is always:
14. What happens to the angle of reflection if the angle of incidence is increased?
15. A kaleidoscope uses three plane mirrors inclined at ________ to each other.
16. The speed of light in water is ________ than its speed in air.
17. A beam of light consisting of rays starting from a point and spreading out is a ________ beam.
18. The shadow of an object is always formed on the ________ side of the light source.
19. If a ray of light is incident normally on a mirror, its path is ________.
20. The middle mirror in a kaleidoscope is usually replaced by a ________ to hold beads.