Differentiate between real and virtual images. What are three basic rays by which we can draw a ray diagram to form an image by a spherical mirror?

Real Image: Formed by actual convergence of rays; can be projected on a screen; inverted.

Virtual Image: Formed by apparent divergence of rays; cannot be projected on a screen; erect.

Basic rays for ray diagrams:

1. A ray parallel to the principal axis passes through the focus after reflection.

2. A ray passing through the focus becomes parallel after reflection.

3. A ray passing through the center of curvature (C) is reflected back on itself.

 

Related Questions:

  1. What is reflection of light? Define the following terms: Incident ray, reflected ray, normal, angle of incidence, and angle of reflection. Describe the laws of reflection.
  2. What are different spherical mirrors? Define different terms involved in spherical mirrors.
  3. Why is a concave mirror called a converging mirror? Why is a convex mirror called a diverging mirror?
  4. Define the principal focus of convex and concave mirrors. Define focal length. Which mirror has a positive focal length? Which has a negative focal length and why?
  5. What is the spherical mirror formula? Also, write down the sign conventions for the spherical mirror formula.
  6. When you look at the front side of a polished spoon, your image is inverted, and from the back of the spoon, your image is erect. Explain why?
  7. Which mirror is used by girls for makeup and why?
  8. Why are large convex mirrors fixed at blind turns of mountains?
  9. Which mirrors are used for the rear view of vehicles and why?
  10. If a person is walking in a pool, why do his legs appear shorter in water?
  11. Why do diamonds sparkle brightly?
  12. When white light passes through a prism, it disperses into its seven colors. Why does dispersion take place in a prism?
  13. A magnifying glass can burn the paper. How is it possible?
  14. Your grandfather uses spectacles to read a newspaper. You see through the spectacles and observe that objects behind it were inverted. Why was it so observed?
  15. Under what condition does a convex lens nearly act as a diverging lens?
  16. What is acoustics and acoustic protection? How does their study help in the construction of different structures?
  17. What is the audible frequency range? Explain in detail.
  18. What are ultrasounds? Give their uses in different fields of life.
  19. Why does sound travel faster in solids than in liquids and gases?
  20. Why are we able to distinguish between two sounds having the same loudness?