Banner 0
Banner 1
Banner 2
Banner 3
Banner 4
Banner 5
Banner 6
Banner 7
Banner 8
Banner 9

Q.

The focal length of the plane mirror is


see full answer

High-Paying Jobs That Even AI Can’t Replace — Through JEE/NEET

🎯 Hear from the experts why preparing for JEE/NEET today sets you up for future-proof, high-income careers tomorrow.
An Intiative by Sri Chaitanya

a

At infinity

b

Zero

c

Negative

d

None of these 

answer is A.

(Unlock A.I Detailed Solution for FREE)

Best Courses for You

JEE

JEE

NEET

NEET

Foundation JEE

Foundation JEE

Foundation NEET

Foundation NEET

CBSE

CBSE

Detailed Solution

Correct Answer: a) At infinity

The focal length of a plane mirror is infinite because parallel rays of light remain parallel after reflection and never converge.

Unlike a spherical mirror with a finite radius of curvature, a plane mirror can be considered part of an infinite-radius sphere.

When parallel rays strike the plane mirror, they are reflected back parallel and either meet at infinity or not at all. Since focal length = R/2 and the radius of curvature (R) of a plane mirror is infinite, its focal length is also infinite.

Watch 3-min video & get full concept clarity

courses

No courses found

Ready to Test Your Skills?

Check your Performance Today with our Free Mock Test used by Toppers!

Take Free Test

score_test_img

Get Expert Academic Guidance – Connect with a Counselor Today!

whats app icon
The focal length of the plane mirror is