What is Plane Mirror vs Spherical Mirror ? :: āĻ¸āĻŽāĻ¤āĻ˛ āĻĻā§°ā§āĻĒāĻŖ āĻŦāĻ¨āĻžāĻŽ āĻā§āĻ˛ā§āĻ¯āĻŧ āĻĻā§°ā§āĻĒāĻŖ
i. Plane Mirror (āĻ¸āĻŽāĻ¤āĻ˛ āĻĻā§°ā§āĻĒāĻŖ): Flat reflecting surface. (āĻ¸āĻŽāĻ¤āĻ˛ āĻĒā§ā§°āĻ¤āĻŋāĻĢāĻ˛āĻŋāĻ¤ āĻĒā§āĻˇā§āĻ āĻĨāĻžāĻā§āĨ¤)
ii. Spherical Mirror (āĻā§āĻ˛ā§āĻ¯āĻŧ āĻĻā§°ā§āĻĒāĻŖ): Curved reflecting surface forming part of a sphere. (āĻā§āĻ˛āĻā§° āĻ āĻāĻļā§° āĻĻā§°ā§ āĻŦā§āĻāĻāĻž āĻĒā§ā§°āĻ¤āĻŋāĻĢāĻ˛āĻŋāĻ¤ āĻĒā§āĻˇā§āĻ āĻĨāĻžāĻā§āĨ¤)
2. Types / āĻĒā§ā§°āĻāĻžā§°:
i. Plane Mirror (āĻ¸āĻŽāĻ¤āĻ˛ āĻĻā§°ā§āĻĒāĻŖ): Always virtual, erect, and same size. (āĻ¸āĻĻāĻžāĻ¯āĻŧ āĻāĻžāĻ˛ā§āĻĒāĻ¨āĻŋāĻ, āĻ¸ā§āĻāĻž āĻā§°ā§ āĻ¸āĻŽāĻžāĻ¨ āĻāĻāĻžā§°ā§° āĻĒā§ā§°āĻ¤āĻŋāĻā§āĻāĻŦāĻŋ āĻāĻ āĻ¨ āĻā§°ā§āĨ¤)
ii. Spherical Mirror (āĻā§āĻ˛ā§āĻ¯āĻŧ āĻĻā§°ā§āĻĒāĻŖ): May be real or virtual; size depends on mirror type and object position. (āĻŦāĻžāĻ¸ā§āĻ¤ā§ą āĻŦāĻž āĻāĻžāĻ˛ā§āĻĒāĻ¨āĻŋāĻ āĻĻā§āĻ¯āĻŧā§ āĻ§ā§°āĻŖā§° āĻš’āĻŦ āĻĒāĻžā§°ā§; āĻāĻāĻžā§° āĻĻā§°ā§āĻĒāĻŖā§° āĻ§ā§°āĻŖ āĻā§°ā§ āĻŦāĻ¸ā§āĻ¤ā§ā§° āĻ ā§ąāĻ¸ā§āĻĨāĻžāĻ¨ā§° āĻāĻĒā§°āĻ¤ āĻ¨āĻŋā§°ā§āĻā§° āĻā§°ā§āĨ¤)
4. Focus / āĻĢā§āĻāĻžāĻ
i. Plane Mirror (āĻ¸āĻŽāĻ¤āĻ˛ āĻĻā§°ā§āĻĒāĻŖ): No real focus; focal length is infinite. (āĻŦāĻžāĻ¸ā§āĻ¤ā§ą āĻĢā§āĻāĻžāĻ āĻ¨āĻžāĻĨāĻžāĻā§; āĻĢā§āĻāĻžāĻ˛ āĻĻā§ā§°ā§āĻā§āĻ¯ āĻ āĻ¸ā§āĻŽāĨ¤)
ii. Spherical Mirror (āĻā§āĻ˛ā§āĻ¯āĻŧ āĻĻā§°ā§āĻĒāĻŖ): Has a principal focus and finite focal length. (āĻĒā§ā§°āĻ§āĻžāĻ¨ āĻĢā§āĻāĻžāĻ āĻā§°ā§ āĻ¨āĻŋā§°ā§āĻĻāĻŋāĻˇā§āĻ āĻĢā§āĻāĻžāĻ˛ āĻĻā§ā§°ā§āĻā§āĻ¯ āĻĨāĻžāĻā§āĨ¤)
5. Field of View / āĻĻā§āĻˇā§āĻāĻŋāĻā§āĻˇā§āĻ¤ā§ā§°: i. Plane Mirror (āĻ¸āĻŽāĻ¤āĻ˛ āĻĻā§°ā§āĻĒāĻŖ): Normal field of view. (āĻ¸āĻžāĻ§āĻžā§°āĻŖ āĻĻā§āĻˇā§āĻāĻŋāĻā§āĻˇā§āĻ¤ā§ā§°āĨ¤) ii. Spherical Mirror: Field of view varies; convex mirror gives wider view. (āĻĻā§āĻˇā§āĻāĻŋāĻā§āĻˇā§āĻ¤ā§ā§° āĻāĻŋāĻ¨ā§āĻ¨ āĻšāĻ¯āĻŧ; āĻāĻ¤ā§āĻ¤āĻ˛ āĻĻā§°ā§āĻĒāĻŖā§ āĻ āĻ§āĻŋāĻ āĻŦāĻŋāĻ¸ā§āĻ¤ā§āĻ¤ āĻĻā§āĻļā§āĻ¯ āĻĻā§āĻāĻžāĻ¯āĻŧāĨ¤)
MCQ on Plane Mirror vs Spherical Mirror (āĻ¸āĻŽāĻ¤āĻ˛ āĻĻā§°ā§āĻĒāĻŖ āĻā§°ā§ āĻā§āĻ˛ā§āĻ¯āĻŧ āĻĻā§°ā§āĻĒāĻŖā§° āĻāĻĒā§°āĻ¤ MCQ)
1. Which mirror has a flat reflecting surface ? (ā§§. āĻā§āĻ¨ āĻĻā§°ā§āĻĒāĻŖā§° āĻĒā§ā§°āĻ¤āĻŋāĻĢāĻ˛āĻŋāĻ¤ āĻĒā§āĻˇā§āĻ āĻ¸āĻŽāĻ¤āĻ˛ ?)
(a) Concave mirror (b) Convex mirror (c) Plane mirror (d) Spherical mirror
Ans / āĻāĻ¤ā§āĻ¤ā§°: (c) Plane mirror
Explanation / āĻŦā§āĻ¯āĻžāĻā§āĻ¯āĻž: A plane mirror has a flat reflecting surface. āĻ¸āĻŽāĻ¤āĻ˛ āĻĻā§°ā§āĻĒāĻŖā§° āĻĒā§ā§°āĻ¤āĻŋāĻĢāĻ˛āĻŋāĻ¤ āĻĒā§āĻˇā§āĻ āĻ¸āĻŽāĻ¤āĻ˛ āĻšāĻ¯āĻŧāĨ¤
2. Which mirror forms part of a sphere ? (ā§¨. āĻā§āĻ¨ āĻĻā§°ā§āĻĒāĻŖ āĻā§āĻ˛āĻā§° āĻ āĻāĻļā§° āĻĻā§°ā§ āĻšāĻ¯āĻŧ ?)
(a) Plane mirror (b) Spherical mirror (c) Water mirror (d) Glass slab
Ans / āĻāĻ¤ā§āĻ¤ā§°: (b) Spherical mirror
Explanation / āĻŦā§āĻ¯āĻžāĻā§āĻ¯āĻž: A spherical mirror has a curved surface forming part of a sphere. (āĻā§āĻ˛ā§āĻ¯āĻŧ āĻĻā§°ā§āĻĒāĻŖā§° āĻĒā§āĻˇā§āĻ āĻŦā§āĻāĻāĻž āĻā§°ā§ āĻā§āĻ˛āĻā§° āĻ āĻāĻļā§° āĻĻā§°ā§ āĻšāĻ¯āĻŧāĨ¤)
3. How many types of spherical mirrors are there ? (ā§Š. āĻā§āĻ˛ā§āĻ¯āĻŧ āĻĻā§°ā§āĻĒāĻŖ āĻāĻŋāĻŽāĻžāĻ¨ āĻĒā§ā§°āĻāĻžā§°ā§° ?)
(a) One (b) Two (c) Three (d) Four
Ans / āĻāĻ¤ā§āĻ¤ā§°: (b) Two
Explanation / āĻŦā§āĻ¯āĻžāĻā§āĻ¯āĻž: Spherical mirrors are of two types: concave and convex. (āĻā§āĻ˛ā§āĻ¯āĻŧ āĻĻā§°ā§āĻĒāĻŖ āĻĻā§āĻ āĻĒā§ā§°āĻāĻžā§° — āĻ ā§ąāĻ¤āĻ˛ āĻā§°ā§ āĻāĻ¤ā§āĻ¤āĻ˛āĨ¤)
4. A plane mirror always forms an image that is: (ā§Ē. āĻ¸āĻŽāĻ¤āĻ˛ āĻĻā§°ā§āĻĒāĻŖā§ āĻ¸āĻĻāĻžāĻ¯āĻŧ āĻā§āĻ¨ā§āĻā§ā§ąāĻž āĻĒā§ā§°āĻ¤āĻŋāĻā§āĻāĻŦāĻŋ āĻāĻ āĻ¨ āĻā§°ā§ ?)
(a) Real and inverted (b) Virtual, erect, and same size (c) Real and enlarged (d) Virtual and diminished
Ans / āĻāĻ¤ā§āĻ¤ā§°: (b) Virtual, erect, and same size
Explanation / āĻŦā§āĻ¯āĻžāĻā§āĻ¯āĻž: A plane mirror always forms a virtual, erect, and same-sized image.(āĻ¸āĻŽāĻ¤āĻ˛ āĻĻā§°ā§āĻĒāĻŖā§ āĻ¸āĻĻāĻžāĻ¯āĻŧ āĻāĻžāĻ˛ā§āĻĒāĻ¨āĻŋāĻ, āĻ¸ā§āĻāĻž āĻā§°ā§ āĻ¸āĻŽāĻžāĻ¨ āĻāĻāĻžā§°ā§° āĻĒā§ā§°āĻ¤āĻŋāĻā§āĻāĻŦāĻŋ āĻāĻ āĻ¨ āĻā§°ā§āĨ¤)
5. Which mirror is used as a rear-view mirror in vehicles ? (ā§Ģ. āĻ¯āĻžāĻ¨āĻŦāĻžāĻšāĻ¨āĻ¤ āĻĒāĻŋāĻāĻĢāĻžāĻ˛ āĻĻā§āĻāĻž āĻĻā§°ā§āĻĒāĻŖ āĻšāĻŋāĻāĻžāĻĒā§ āĻā§āĻ¨āĻā§ āĻŦā§āĻ¯ā§ąāĻšāĻžā§° āĻā§°āĻž āĻšāĻ¯āĻŧ ?)
(a) Plane mirror (b) Concave mirror (c) Convex mirror (d) Glass mirror
Ans / āĻāĻ¤ā§āĻ¤ā§°: (c) Convex mirror
Explanation / āĻŦā§āĻ¯āĻžāĻā§āĻ¯āĻž: Convex mirrors provide a wider field of view. (āĻāĻ¤ā§āĻ¤āĻ˛ āĻĻā§°ā§āĻĒāĻŖā§ āĻ āĻ§āĻŋāĻ āĻŦāĻŋāĻ¸ā§āĻ¤ā§āĻ¤ āĻĻā§āĻļā§āĻ¯ āĻĻā§āĻā§ā§ąāĻžāĻ¯āĻŧāĨ¤)
6. The focal length of a plane mirror is: ā§Ŧ. āĻ¸āĻŽāĻ¤āĻ˛ āĻĻā§°ā§āĻĒāĻŖā§° āĻĢā§āĻāĻžāĻ˛ āĻĻā§ā§°ā§āĻā§āĻ¯ āĻāĻŋāĻŽāĻžāĻ¨ ?
(a) Zero (b) One metre (c) Infinite (d) Negative
Ans / āĻāĻ¤ā§āĻ¤ā§°: (c) Infinite
Explanation / āĻŦā§āĻ¯āĻžāĻā§āĻ¯āĻž: A plane mirror has no real focus, so its focal length is infinite. āĻ¸āĻŽāĻ¤āĻ˛ āĻĻā§°ā§āĻĒāĻŖā§° āĻŦāĻžāĻ¸ā§āĻ¤ā§ą āĻĢā§āĻāĻžāĻ āĻ¨āĻžāĻĨāĻžāĻā§, āĻ¸ā§āĻ¯āĻŧā§ āĻĢā§āĻāĻžāĻ˛ āĻĻā§ā§°ā§āĻā§āĻ¯ āĻ āĻ¸ā§āĻŽāĨ¤
7. Which mirror can form both real and virtual images ? (ā§. āĻā§āĻ¨ āĻĻā§°ā§āĻĒāĻŖā§ āĻŦāĻžāĻ¸ā§āĻ¤ā§ą āĻā§°ā§ āĻāĻžāĻ˛ā§āĻĒāĻ¨āĻŋāĻ āĻĻā§āĻ¯āĻŧā§ āĻ§ā§°āĻŖā§° āĻĒā§ā§°āĻ¤āĻŋāĻā§āĻāĻŦāĻŋ āĻāĻ āĻ¨ āĻā§°āĻŋāĻŦ āĻĒāĻžā§°ā§ ?)
(a) Plane mirror (b) Concave mirror (c) Convex mirror (d) Water mirror
Ans / āĻāĻ¤ā§āĻ¤ā§°: (b) Concave mirror
Explanation / āĻŦā§āĻ¯āĻžāĻā§āĻ¯āĻž: A concave mirror can form real or virtual images depending on object position. (āĻ ā§ąāĻ¤āĻ˛ āĻĻā§°ā§āĻĒāĻŖā§ āĻŦāĻ¸ā§āĻ¤ā§ā§° āĻ ā§ąāĻ¸ā§āĻĨāĻžāĻ¨ āĻ āĻ¨ā§āĻ¸ā§°āĻŋ āĻŦāĻžāĻ¸ā§āĻ¤ā§ą āĻŦāĻž āĻāĻžāĻ˛ā§āĻĒāĻ¨āĻŋāĻ āĻĒā§ā§°āĻ¤āĻŋāĻā§āĻāĻŦāĻŋ āĻāĻ āĻ¨ āĻā§°āĻŋāĻŦ āĻĒāĻžā§°ā§āĨ¤)
8. Which mirror is commonly used for shaving or makeup ? (ā§Ž. āĻļā§āĻāĻŋāĻ āĻŦāĻž āĻŽā§āĻāĻāĻĒā§° āĻŦāĻžāĻŦā§ āĻ¸āĻžāĻ§āĻžā§°āĻŖāĻ¤ā§ āĻā§āĻ¨ āĻĻā§°ā§āĻĒāĻŖ āĻŦā§āĻ¯ā§ąāĻšāĻžā§° āĻā§°āĻž āĻšāĻ¯āĻŧ ?)
(a) Convex mirror (b) Plane mirror (c) Concave mirror (d) Black mirror
Ans / āĻāĻ¤ā§āĻ¤ā§°: (c) Concave mirror
Explanation / āĻŦā§āĻ¯āĻžāĻā§āĻ¯āĻž: Concave mirrors produce enlarged images when the object is close. (āĻ ā§ąāĻ¤āĻ˛ āĻĻā§°ā§āĻĒāĻŖā§ āĻāĻā§°ā§° āĻŦāĻ¸ā§āĻ¤ā§ā§° āĻĄāĻžāĻā§° āĻĒā§ā§°āĻ¤āĻŋāĻā§āĻāĻŦāĻŋ āĻāĻ āĻ¨ āĻā§°ā§āĨ¤)
9. Which mirror gives a wider field of view ? (ā§¯. āĻā§āĻ¨ āĻĻā§°ā§āĻĒāĻŖā§ āĻ āĻ§āĻŋāĻ āĻŦāĻŋāĻ¸ā§āĻ¤ā§āĻ¤ āĻĻā§āĻˇā§āĻāĻŋāĻā§āĻˇā§āĻ¤ā§ā§° āĻĻāĻŋāĻ¯āĻŧā§ ?)
(a) Plane mirror (b) Concave mirror (c) Convex mirror (d) None
Ans / āĻāĻ¤ā§āĻ¤ā§°: (c) Convex mirror
Explanation / āĻŦā§āĻ¯āĻžāĻā§āĻ¯āĻž: Convex mirrors spread reflected rays and show a larger area. āĻāĻ¤ā§āĻ¤āĻ˛ āĻĻā§°ā§āĻĒāĻŖā§ āĻ āĻ§āĻŋāĻ āĻāĻ˛ā§āĻāĻž āĻĻā§āĻā§ā§ąāĻžāĻ¯āĻŧāĨ¤
10. Bathroom mirrors are usually: ā§§ā§Ļ. āĻŦāĻžāĻĨā§°ā§āĻŽā§° āĻĻā§°ā§āĻĒāĻŖ āĻ¸āĻžāĻ§āĻžā§°āĻŖāĻ¤ā§ āĻā§āĻ¨ā§āĻā§ā§ąāĻž āĻšāĻ¯āĻŧ ?
(a) Convex (b) Concave (c) Plane mirror (d) Spherical
Ans / āĻāĻ¤ā§āĻ¤ā§°: (c) Plane mirror
Explanation / āĻŦā§āĻ¯āĻžāĻā§āĻ¯āĻž: Plane mirrors give erect and same-sized images suitable for daily use. āĻ¸āĻŽāĻ¤āĻ˛ āĻĻā§°ā§āĻĒāĻŖā§ āĻ¸ā§āĻāĻž āĻā§°ā§ āĻ¸āĻŽāĻžāĻ¨ āĻāĻāĻžā§°ā§° āĻĒā§ā§°āĻ¤āĻŋāĻā§āĻāĻŦāĻŋ āĻĻāĻŋāĻ¯āĻŧā§, āĻ¯āĻŋ āĻĻā§āĻ¨āĻ¨ā§āĻĻāĻŋāĻ¨ āĻŦā§āĻ¯ā§ąāĻšāĻžā§°ā§° āĻŦāĻžāĻŦā§ āĻāĻĒāĻ¯ā§āĻā§āĨ¤