Plane Mirror â Basic Diagram (āϏāĻŽāϤāϞ āĻĻāĻžāĻĒā§āύ â āĻŽā§āϞāĻŋāĻ āĻāĻŋāϤā§ā§°)
- A plane mirror has a flat reflecting surface. āϏāĻŽāϤāϞ āĻĻāĻžāĻĒā§āύ⧰ āĻĒā§ā§°āϤāĻŋāĻĢāϞāĻ āĻĒā§āώā§āĻ āϏāĻŽāϤāϞ āĻšāϝāĻŧāĨ¤
- It forms a virtual, erect image of the same size. āĻ āĻ ā§ąāĻžāϏā§āĻ¤ā§ą, āĻĨāĻŋāϝāĻŧ āĻā§°ā§ āĻŦāϏā§āϤā§ā§° āϏāĻŽāĻžāύ āĻāĻāĻžā§°ā§° āĻĒā§ā§°āϤāĻŋāĻā§āĻāĻŦāĻŋ āĻāĻ āύ āĻā§°ā§āĨ¤
- The image is formed at the same distance behind the mirror as the object is in front. āĻŦāϏā§āϤ⧠āĻĻāĻžāĻĒā§āύ⧰ āĻāĻāĻĢāĻžāϞ⧠āϝāĻŋāĻŽāĻžāύ āĻĻā§ā§°āϤ āĻĨāĻžāĻā§, āĻĒā§ā§°āϤāĻŋāĻā§āĻāĻŦāĻŋ āĻĻāĻžāĻĒā§āύ⧰ āĻĒāĻŋāĻāĻĢāĻžāϞ⧠āĻ āĻŋāĻ āϏāĻŋāĻŽāĻžāύ āĻĻā§ā§°āϤ āĻāĻ āύ āĻšāϝāĻŧāĨ¤
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MCQs
1. A plane mirror has a:
āϏāĻŽāϤāϞ āĻĻāĻžāĻĒā§āύ⧰ āĻā§āύā§āϧ⧰āĻŖā§° āĻĒā§ā§°āϤāĻŋāĻĢāϞāĻ āĻĒā§āώā§āĻ āĻĨāĻžāĻā§ ?
A) Curved inward | B) Curved outward | C) Flat reflecting surface | D) Wavy surface
Ans: C) Flat reflecting surface
Explanation: A plane mirror has a flat and smooth reflecting surface. āĻŦā§āϝāĻžāĻā§āϝāĻž: āϏāĻŽāϤāϞ āĻĻāĻžāĻĒā§āύ⧰ āĻĒā§ā§°āϤāĻŋāĻĢāϞāĻ āĻĒā§āώā§āĻ āϏāĻŽāϤāϞ āĻā§°ā§ āĻŽāϏā§āĻŖ āĻšāϝāĻŧāĨ¤
2. The image formed by a plane mirror is: āϏāĻŽāϤāϞ āĻĻāĻžāĻĒā§āύāϤ āĻāĻ āĻŋāϤ āĻĒā§ā§°āϤāĻŋāĻā§āĻāĻŦāĻŋ āĻā§āύā§āϧ⧰āĻŖā§° āĻšāϝāĻŧ ?
A) Real and inverted | B) Virtual, erect and same size | C) Real and enlarged | D) Virtual and diminished
Ans: B) Virtual, erect and same size
Explanation: A plane mirror always forms a virtual, erect image that is equal in size to the object. āĻŦā§āϝāĻžāĻā§āϝāĻž: āϏāĻŽāϤāϞ āĻĻāĻžāĻĒā§āύ⧠āϏāĻĻāĻžāϝāĻŧ āĻ ā§ąāĻžāϏā§āĻ¤ā§ą, āĻĨāĻŋāϝāĻŧ āĻā§°ā§ āĻŦāϏā§āϤā§ā§° āϏāĻŽāĻžāύ āĻāĻāĻžā§°ā§° āĻĒā§ā§°āϤāĻŋāĻā§āĻāĻŦāĻŋ āĻāĻ āύ āĻā§°ā§āĨ¤
3. The image formed by a plane mirror is located: āϏāĻŽāϤāϞ āĻĻāĻžāĻĒā§āύāϤ āĻāĻ āĻŋāϤ āĻĒā§ā§°āϤāĻŋāĻā§āĻāĻŦāĻŋ āĻ'āϤ āĻ ā§ąāϏā§āĻĨāĻŋāϤ ?
A) In front of the mirror | B) At the pole | C) Behind the mirror at the same distance as the object | D) At infinity
Ans: C) Behind the mirror at the same distance as the object
Explanation: The image is formed behind the mirror at a distance equal to the object's distance in front of the mirror. āĻŦā§āϝāĻžāĻā§āϝāĻž: āĻĒā§ā§°āϤāĻŋāĻā§āĻāĻŦāĻŋāĻāύ āĻĻāĻžāĻĒā§āύ⧰ āĻĒāĻŋāĻāĻĢāĻžāϞā§, āĻŦāϏā§āϤ⧠āĻāĻāĻĢāĻžāϞ⧠āĻĨāĻāĻž āĻĻā§ā§°āϤā§āĻŦā§° āϏāĻŽāĻžāύ āĻĻā§ā§°āϤā§āĻŦāϤ āĻāĻ āύ āĻšāϝāĻŧāĨ¤
4. Which statement is correct about a plane mirror ? āϏāĻŽāϤāϞ āĻĻāĻžāĻĒā§āύ⧰ āĻŦāĻŋāώāϝāĻŧā§ āϤāϞ⧰ āĻā§āύāĻā§ āĻāĻā§āϤāĻŋ āϏāĻ āĻŋāĻ ?
A) It has a curved reflecting surface. | B) It forms a real image. | C) It has a flat reflecting surface and forms a virtual image. | D) It always forms a diminished image.
Ans: C) It has a flat reflecting surface and forms a virtual image.
Explanation: A plane mirror has a flat reflecting surface and always forms a virtual, erect image. āĻŦā§āϝāĻžāĻā§āϝāĻž: āϏāĻŽāϤāϞ āĻĻāĻžāĻĒā§āύ⧰ āĻĒā§ā§°āϤāĻŋāĻĢāϞāĻ āĻĒā§āώā§āĻ āϏāĻŽāϤāϞ āĻšāϝāĻŧ āĻā§°ā§ āĻ āϏāĻĻāĻžāϝāĻŧ āĻ ā§ąāĻžāϏā§āĻ¤ā§ą, āĻĨāĻŋāϝāĻŧ āĻĒā§ā§°āϤāĻŋāĻā§āĻāĻŦāĻŋ āĻāĻ āύ āĻā§°ā§āĨ¤
5. In a plane mirror, the distance of the image from the mirror is: āϏāĻŽāϤāϞ āĻĻāĻžāĻĒā§āύāϤ āĻĒā§ā§°āϤāĻŋāĻā§āĻāĻŦāĻŋā§° āĻĻāĻžāĻĒā§āύ⧰ āĻĒā§°āĻž āĻĻā§ā§°āϤā§āĻŦ āĻā§āύ⧠āĻšāϝāĻŧ ?
A) Greater than the object's distance | B) Less than the object's distance | C) Equal to the object's distance from the mirror | D) Zero
Ans: C) Equal to the object's distance from the mirror
Explanation: The image forms at the same distance behind the mirror as the object is in front. āĻŦā§āϝāĻžāĻā§āϝāĻž: āĻĒā§ā§°āϤāĻŋāĻā§āĻāĻŦāĻŋāĻāύ āĻĻāĻžāĻĒā§āύ⧰ āĻĒāĻŋāĻāĻĢāĻžāϞā§, āĻŦāϏā§āϤ⧠āĻāĻāĻĢāĻžāϞ⧠āĻĨāĻāĻž āĻĻā§ā§°āϤā§āĻŦā§° āϏāĻŽāĻžāύ āĻĻā§ā§°āϤā§āĻŦāϤ āĻāĻ āύ āĻšāϝāĻŧāĨ¤
Trick
Plane Mirror = Flat + VESD
- F = Flat Reflecting Surface (āϏāĻŽāϤāϞ āĻĒā§ā§°āϤāĻŋāĻĢāϞāĻ āĻĒā§āώā§āĻ )
- V = Virtual (āĻ ā§ąāĻžāϏā§āĻ¤ā§ą)
- E = Erect (āĻĨāĻŋāϝāĻŧ)
- S = Same Size (āϏāĻŽāĻžāύ āĻāĻāĻžā§°)
- D = Same Distance Behind the Mirror (āϏāĻŽāĻžāύ āĻĻā§ā§°āϤā§āĻŦ)