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Focal Length

CBSE X Physics Light - Reflection and Refraction

what is focal length of a plane mirror/

Asked by 22nd February 2008 12:32 AM
Answered by Expert

CBSE X Physics Light - Reflection and Refraction

How to know that the given focal length/dictance is positive or negative

Asked by 24th February 2008 11:30 AM
Answered by Expert

CBSE IX Physics

How to find out the radius of curvature of a covex lens when focal length is given?

Asked by 12th March 2008 9:13 PM
Answered by Expert

CBSE X Physics Light - Reflection and Refraction

what will happen to the focal length of a concave mirror, convex mirror, concave lens and convex lens when immersed in water? will it change ? if yes explain .(3 marks)

Asked by Rida Mukadam 21st February 2015 7:43 PM
Answered by Expert

CBSE XII Science Physics Ray Optics and Optical Instruments

establish the relation 1/u+1/v=1/f for a concave mirror forming virtual image

Asked by uttam kumar 23rd February 2015 9:31 AM
Answered by Expert

CBSE XII Science Physics Ray Optics and Optical Instruments

Q.On a convex lens ,light of red and violet colour is incident separately , then how does the focal length of lens change?

Asked by Ravi consul 4th March 2015 6:48 PM
Answered by Expert

CBSE XII Science Physics

a convex lens of focal length f is cut into two halves such that one surface of each is plane what is the focal length of each half

Asked by deepakphy93 3rd January 2018 1:08 PM
Answered by Expert

CBSE X Science

Prove mathematically that r=2f for mirror.  

Asked by shyamala.holla3 16th February 2018 3:35 PM
Answered by Expert

CBSE XII Science Physics

Dera sir, please explain the displacement method to find the focal length of the convex lens in detail

Asked by modi72879 22nd February 2018 10:03 PM
Answered by Expert

CBSE X Physics

PLS EXPLAIN

Asked by gpnkumar0 14th March 2018 9:17 PM
Answered by Expert

CBSE X Physics

PLS EXPLAIN

Asked by gpnkumar0 14th March 2018 9:28 PM
Answered by Expert

JEE JEE (Main) Physics

plz solve the question with explanation

Asked by futureisbright051101 11th April 2018 6:41 AM
Answer Verified by Expert

JEE JEE (Main) Physics

plz solve the question with explanation

Asked by futureisbright051101 11th April 2018 6:49 AM
Answer Verified by Expert

ICSE X Physics

Q. 1

Asked by Rayeesa 25th April 2018 9:53 PM
Answered by Expert

ICSE X Physics Refraction Through a Lens

Q. 2

Asked by Rayeesa 25th April 2018 9:54 PM
Answered by Expert

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