Question

In Young's double slit experiment, if the sodium light is replaced by violet light of same intensity then in the interference pattern

• A. $\beta$ will decrease
• B. $\beta$ will increase
• C. $I$ will decrease
• D. $I$ will increase

Answer 1

The correct option is A $\beta$ will decrease

As intensity is not changed, the resultant intensity will not change

Violet light has smaller wavelength than sodium light. $\beta =\lambda D/d$

Therefore as wavelength is small for violet light, the $\beta$ decreases

Answer. A) $\beta$ will decrease