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Solution


Q.

Given below are two statements. One is labelled as Assertion (A) and the other is labelled as Reason (R)

Assertion (A) : In Young's double slit experiment, the fringes produced by red light are closer as compared to those produced by blue light.

Reason (R) : The fringe width is directly proportional to the wavelength of light.

In the light of above statements, choose the correct answer from the options given below:          [2025]
1 Both (A) and (R) are true and (R) is the correct explanation of (A).  
2 (A) is false but (R) is true.  
3 Both (A) and (R) are true but (R) is NOT the correct explanation of (A)  
4 (A) is true but (R) is false.  

Ans.

(2)

β=λDd

λred<λblue

Assertion is false

Reason is true