Physics Practice: Light Energy (Mock Test 4 - Expert)
1. Expert Analysis: In a searchlight, the light source is placed exactly at the focus of a large concave mirror. This setup is designed to produce:
2. Clinical Logic: Why does a convex mirror always provide a wider field of view compared to a plane mirror of the same aperture?
3. An object is placed at a distance of $20\text{ cm}$ in front of a concave mirror of focal length $10\text{ cm}$. The magnification produced is:
4. Experimental Setup: When white light passes through two identical prisms—one upright and one inverted—the resulting emergent light is:
5. Which of the following is true for an object placed between $C$ and $F$ of a concave mirror?
6. Data-based: A ray of light is incident at $45^\circ$ on a plane mirror. If the mirror is tilted by $15^\circ$ towards the incident ray, the new angle of reflection is:
7. Why are parabolic mirrors used in astronomical telescopes instead of simple spherical concave mirrors?
8. In a periscope, two plane mirrors are placed ________ to each other and at an angle of ________ to the tube.
9. If an object moves towards a plane mirror at a speed of $v$, the relative speed of the image with respect to the object is:
10. The refractive index of Diamond is $2.42$. This high value means that:
11. A ray of light incident on a convex mirror parallel to the principal axis appears to diverge from:
12. Which color of light has the longest wavelength in the visible spectrum?
13. For a virtual image formed by a concave mirror, the magnification ($m$) is always:
14. What is "Primary" color in the context of light?
15. Why does a pool of water appear shallower than it actually is?
16. In Sign Convention, the focal length of a concave mirror is ________ and for a convex mirror is ________.
17. A beam of light incident on a plane mirror at $0^\circ$ angle of incidence will be reflected at:
18. Total Internal Reflection occurs only when light travels from ________ to ________ medium.
19. If the magnification of a mirror is exactly $+1$, the mirror is definitely a:
20. The color of an opaque object is determined by the color of light it ________.
