Physics Practice: Light Energy (Mock Test 1 - Basic)
1. The bouncing back of light into the same medium after hitting a polished surface is called:
2. According to the laws of reflection, the angle of incidence ($i$) is always ________ the angle of reflection ($r$).
3. A smooth, highly polished surface which reflects almost all the light falling on it is a:
4. The phenomenon where the left side of an object appears as the right side in a plane mirror is:
5. Which of the following forms a virtual, erect, and same-sized image?
6. Reflection from a rough or uneven surface is known as ________ reflection.
7. The perpendicular drawn to the reflecting surface at the point of incidence is the:
8. In a plane mirror, the distance of the image from the mirror is ________ the distance of the object from the mirror.
9. Which of these is a primary source of light?
10. An image that can be obtained on a screen is called a ________ image.
11. A ray of light hitting a mirror at an angle of $30^\circ$ to the normal will reflect at:
12. Which of the following is used in a periscope?
13. The angle between the incident ray and the normal is the angle of ________.
14. Plane mirrors are arranged at ________ to each other in a kaleidoscope to form multiple images.
15. An object placed between two parallel plane mirrors will form ________ images.
16. The speed of light in air is approximately:
17. Regular reflection takes place from surfaces like:
18. The color of light is determined by its ________.
19. White light is a mixture of ________ colors.
20. In a periscope, the two plane mirrors are fixed at an angle of ________ with the vertical.