Reflecting Surface of Mirrors : āĻĻāĻžāĻĒā§āĻ¨ā§° āĻĒā§ā§°āĻ¤āĻŋāĻĢāĻ˛āĻ āĻĒā§āĻˇā§āĻ (Reflecting Surface)
- The reflecting surface is the polished side of a mirror from which light is reflected.
āĻĒā§ā§°āĻ¤āĻŋāĻĢāĻ˛āĻ āĻĒā§āĻˇā§āĻ āĻšā§āĻā§ āĻĻāĻžāĻĒā§āĻ¨ā§° āĻŽāĻ¸ā§āĻŖ āĻŦāĻž āĻĒāĻžāĻ˛āĻŋāĻ āĻā§°āĻž āĻ āĻāĻļ, āĻ¯'ā§° āĻĒā§°āĻž āĻĒā§āĻšā§° āĻĒā§ā§°āĻ¤āĻŋāĻĢāĻ˛āĻŋāĻ¤ āĻšāĻ¯āĻŧāĨ¤ - In a plane mirror, the reflecting surface is flat. āĻ¸āĻŽāĻ¤āĻ˛ āĻĻāĻžāĻĒā§āĻ¨āĻ¤, āĻĒā§ā§°āĻ¤āĻŋāĻĢāĻ˛āĻ āĻĒā§āĻˇā§āĻ āĻ¸āĻŽāĻ¤āĻ˛ āĻšāĻ¯āĻŧāĨ¤
- In a concave mirror, the reflecting surface is on the inner curved side. āĻ ā§ąāĻ¤āĻ˛ āĻĻāĻžāĻĒā§āĻ¨āĻ¤, āĻĒā§ā§°āĻ¤āĻŋāĻĢāĻ˛āĻ āĻĒā§āĻˇā§āĻ āĻāĻŋāĻ¤ā§°āĻĢāĻžāĻ˛ā§ āĻŦāĻžāĻāĻāĻž āĻ āĻāĻļāĻ¤ āĻĨāĻžāĻā§āĨ¤
- In a convex mirror, the reflecting surface is on the outer curved side. āĻāĻ¤ā§āĻ¤āĻ˛ āĻĻāĻžāĻĒā§āĻ¨āĻ¤, āĻĒā§ā§°āĻ¤āĻŋāĻĢāĻ˛āĻ āĻĒā§āĻˇā§āĻ āĻŦāĻžāĻšāĻŋā§°āĻĢāĻžāĻ˛ā§ āĻŦāĻžāĻāĻāĻž āĻ āĻāĻļāĻ¤ āĻĨāĻžāĻā§āĨ¤
MCQs
1. What is the reflecting surface of a mirror ? āĻĻāĻžāĻĒā§āĻ¨ā§° āĻĒā§ā§°āĻ¤āĻŋāĻĢāĻ˛āĻ āĻĒā§āĻˇā§āĻ āĻŦā§āĻ˛āĻŋāĻ˛ā§ āĻāĻŋ āĻŦā§āĻāĻžāĻ¯āĻŧ ?
A) Rough side | B) Painted side | C) Polished side from which light is reflected | D) Back side
Ans: C) Polished side from which light is reflected
Explanation: The reflecting surface is the polished surface that reflects light. āĻŦā§āĻ¯āĻžāĻā§āĻ¯āĻž: āĻĒā§ā§°āĻ¤āĻŋāĻĢāĻ˛āĻ āĻĒā§āĻˇā§āĻ āĻšā§āĻā§ āĻŽāĻ¸ā§āĻŖ āĻŦāĻž āĻĒāĻžāĻ˛āĻŋāĻ āĻā§°āĻž āĻĒā§āĻˇā§āĻ , āĻ¯'ā§° āĻĒā§°āĻž āĻĒā§āĻšā§° āĻĒā§ā§°āĻ¤āĻŋāĻĢāĻ˛āĻŋāĻ¤ āĻšāĻ¯āĻŧāĨ¤
2. The reflecting surface of a plane mirror is: āĻ¸āĻŽāĻ¤āĻ˛ āĻĻāĻžāĻĒā§āĻ¨ā§° āĻĒā§ā§°āĻ¤āĻŋāĻĢāĻ˛āĻ āĻĒā§āĻˇā§āĻ āĻā§āĻ¨ā§āĻ§ā§°āĻŖā§° ?
A) Curved inward | B) Curved outward | C) Flat | D) Irregular
Ans: C) Flat
Explanation: A plane mirror has a flat reflecting surface. āĻŦā§āĻ¯āĻžāĻā§āĻ¯āĻž: āĻ¸āĻŽāĻ¤āĻ˛ āĻĻāĻžāĻĒā§āĻ¨ā§° āĻĒā§ā§°āĻ¤āĻŋāĻĢāĻ˛āĻ āĻĒā§āĻˇā§āĻ āĻ¸āĻŽāĻ¤āĻ˛ āĻšāĻ¯āĻŧāĨ¤
3. In a concave mirror, the reflecting surface is on the: āĻ ā§ąāĻ¤āĻ˛ āĻĻāĻžāĻĒā§āĻ¨āĻ¤ āĻĒā§ā§°āĻ¤āĻŋāĻĢāĻ˛āĻ āĻĒā§āĻˇā§āĻ āĻ'āĻ¤ āĻĨāĻžāĻā§ ?
A) Outer curved side | B) Inner curved side | C) Flat side | D) Back side
Ans: B) Inner curved side
Explanation: A concave mirror reflects light from its inner curved surface. āĻŦā§āĻ¯āĻžāĻā§āĻ¯āĻž: āĻ ā§ąāĻ¤āĻ˛ āĻĻāĻžāĻĒā§āĻ¨ā§ āĻāĻŋāĻ¤ā§°āĻĢāĻžāĻ˛ā§ āĻŦāĻžāĻāĻāĻž āĻĒā§āĻˇā§āĻ ā§° āĻĒā§°āĻž āĻĒā§āĻšā§° āĻĒā§ā§°āĻ¤āĻŋāĻĢāĻ˛āĻŋāĻ¤ āĻā§°ā§āĨ¤
4. In a convex mirror, the reflecting surface is on the: āĻāĻ¤ā§āĻ¤āĻ˛ āĻĻāĻžāĻĒā§āĻ¨āĻ¤ āĻĒā§ā§°āĻ¤āĻŋāĻĢāĻ˛āĻ āĻĒā§āĻˇā§āĻ āĻ'āĻ¤ āĻĨāĻžāĻā§ ?
A) Outer curved side | B) Inner curved side | C) Flat side | D) Centre
Ans: A) Outer curved side
Explanation: A convex mirror reflects light from its outer curved surface. āĻŦā§āĻ¯āĻžāĻā§āĻ¯āĻž: āĻāĻ¤ā§āĻ¤āĻ˛ āĻĻāĻžāĻĒā§āĻ¨ā§ āĻŦāĻžāĻšāĻŋā§°āĻĢāĻžāĻ˛ā§ āĻŦāĻžāĻāĻāĻž āĻĒā§āĻˇā§āĻ ā§° āĻĒā§°āĻž āĻĒā§āĻšā§° āĻĒā§ā§°āĻ¤āĻŋāĻĢāĻ˛āĻŋāĻ¤ āĻā§°ā§āĨ¤
5. Which of the following is correctly matched ? āĻ¤āĻ˛ā§° āĻā§āĻ¨āĻā§ āĻ¸āĻ āĻŋāĻāĻāĻžā§ąā§ āĻŽāĻŋāĻ˛ā§ā§ąāĻž āĻšā§āĻā§ ?
A) Plane Mirror – Flat Reflecting Surface | B) Concave Mirror – Inner Curved Surface | C) Convex Mirror – Outer Curved Surface | D) All of the above
Ans: D) All of the above
Explanation:All the given matches are correct. āĻŦā§āĻ¯āĻžāĻā§āĻ¯āĻž: āĻāĻ˛ā§āĻ˛ā§āĻ āĻā§°āĻž āĻ¤āĻŋāĻ¨āĻŋāĻāĻāĻž āĻŽāĻŋāĻ˛ āĻ¸āĻ āĻŋāĻāĨ¤ āĻ¸ā§āĻ¯āĻŧā§āĻšā§ āĻāĻ¤ā§āĻ¤ā§° All of the aboveāĨ¤
6. Which mirror has its reflecting surface on the outer curved side ? āĻā§āĻ¨āĻā§ āĻĻāĻžāĻĒā§āĻ¨ā§° āĻĒā§ā§°āĻ¤āĻŋāĻĢāĻ˛āĻ āĻĒā§āĻˇā§āĻ āĻŦāĻžāĻšāĻŋā§°āĻĢāĻžāĻ˛ā§ āĻŦāĻžāĻāĻāĻž āĻ āĻāĻļāĻ¤ āĻĨāĻžāĻā§ ?
A) Plane Mirror | B) Concave Mirror | C) Convex Mirror | D) None of these
Ans: C) Convex Mirror
Explanation: The reflecting surface of a convex mirror is on the outer curved side. āĻŦā§āĻ¯āĻžāĻā§āĻ¯āĻž: āĻāĻ¤ā§āĻ¤āĻ˛ āĻĻāĻžāĻĒā§āĻ¨ā§° āĻĒā§ā§°āĻ¤āĻŋāĻĢāĻ˛āĻ āĻĒā§āĻˇā§āĻ āĻŦāĻžāĻšāĻŋā§°āĻĢāĻžāĻ˛ā§ āĻŦāĻžāĻāĻāĻž āĻ āĻāĻļāĻ¤ āĻĨāĻžāĻā§āĨ¤
Trick
- Plane Mirror → Flat Reflecting Surface (āĻ¸āĻŽāĻ¤āĻ˛)
- Concave Mirror → Inner Curved Reflecting Surface (āĻāĻŋāĻ¤ā§°āĻĢāĻžāĻ˛ā§ āĻŦāĻžāĻāĻāĻž)
- Convex Mirror → Outer Curved Reflecting Surface (āĻŦāĻžāĻšāĻŋā§°āĻĢāĻžāĻ˛ā§ āĻŦāĻžāĻāĻāĻž)