Physics Practice: Light Energy (Mock Test 3 - Advanced)
1. Why is a virtual image formed by a plane mirror called "virtual"?
2. When an object is moved from Infinity towards the Pole of a concave mirror, the real image moves:
3. What mechanism explains the use of a concave mirror as a shaving mirror?
4. Why does a prism disperse white light into a spectrum, while a rectangular glass slab usually does not?
5. If an incident ray strikes a plane mirror and the mirror is rotated by an angle $\theta$, the reflected ray rotates by:
6. A ray of light is incident on a concave mirror passing through the Focus ($F$). After reflection, the ray will:
7. The "Sign Convention" states that distances measured in the direction of incident light are taken as:
8. Why does a convex mirror always have a focal length with a positive sign in numericals?
9. "Reversibility of Light" implies that if a reflected ray is treated as an incident ray:
10. For a spherical mirror, if the magnification ($m$) is $-2$, the image is:
11. A ray incident at the Pole ($P$) of a spherical mirror is reflected such that:
12. What happens to the speed of light when it passes from Air into Glass?
13. In which case will a concave mirror form a real image of the same size as the object?
14. The focal length of a plane mirror is considered to be:
15. Why is the "Danger" signal always red in color?
16. Image formed by a convex mirror is always ________, regardless of the object's position.
17. A beam of light consisting of rays starting from a point and moving in different directions is:
18. The refractive index of a medium is the ratio of speed of light in vacuum to:
19. In a concave mirror, to get a highly magnified image at infinity, the object must be at:
20. The angle between the incident ray and the reflecting surface is the:
