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.

Reflection of light is the bouncing back of light when it strikes a smooth surface.

Incident ray: The incoming ray that strikes the surface.

Reflected ray: The outgoing ray after reflection.

Normal: A perpendicular line drawn at the point of incidence.

Angle of incidence (i): The angle between the incident ray and the normal.

Angle of reflection (r): The angle between the reflected ray and the normal.

Laws of Reflection:

1. The angle of incidence is equal to the angle of reflection.

2. The incident ray, the normal, and the reflected ray all lie in the same plane.

Related Questions:

  1. What are different spherical mirrors? Define different terms involved in spherical mirrors.
  2. 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?
  3. Which mirror is used by girls for makeup and why?
  4. Why are large convex mirrors fixed at blind turns of mountains?
  5. Which mirrors are used for the rear view of vehicles and why?
  6. If a person is walking in a pool, why do his legs appear shorter in water?
  7. Why do diamonds sparkle brightly?
  8. When white light passes through a prism, it disperses into its seven colors. Why does dispersion take place in a prism?
  9. A magnifying glass can burn the paper. How is it possible?
  10. 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?
  11. Under what condition does a convex lens nearly act as a diverging lens?
  12. What is the relation between frequency and pitch of a sound?
  13. Explain SONAR and its applications.
  14. What is intensity of sound? What is the range of intensity of audible sound? Differentiate between loudness and intensity of sound.
  15. Define intensity level. Derive the formula for its decibel scale.
  16. Differentiate between noise and music. Explain how noise is a nuisance.
  17. What is acoustics and acoustic protection? How does their study help in the construction of different structures?
  18. What is the audible frequency range? Explain in detail.
  19. What are ultrasounds? Give their uses in different fields of life.
  20. Why does sound travel faster in solids than in liquids and gases?