Question

. Assertion (A): The focal length of lens changes when red light is replaced by blue light.
Reason (R) : The focal length of lens does not depend on colour of light used.
A) Both A and R are true and R is correct explanation of A
C) A is true but R is false
B) Both A and Rare true and R is not the correct explanation of A D) A is false but R is true
A​

Answer 1

Answer:

option d

Explanation:

focal length does not depend on colour

Answer 2

Both A and R are incorrect....

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