In Young's double slit experiment, the first bright band for blue light is closer to the centre…
Assertion: In Young's double slit experiment, the first bright band for blue light is closer to the centre than the first bright band for green light.
Reason: Blue light has a longer wavelength than green light.
Given below are two statements marked, Assertion and Reason. Read the two statements and choose the correct option.
- (a)Both Assertion and Reason are true and Reason is the correct explanation for Assertion.
- (b)Both Assertion and Reason are true but Reason is not the correct explanation for Assertion.
- (c)Assertion is true and Reason is false.
- (d)Assertion is false and Reason is true.
Answer
Answer
AIWritten by AI - it can contain mistakes.
Correct option: (c)
Assertion is true because the position of the first bright fringe is $y_1 = \frac{\lambda D}{d}$, and since $\lambda_{\text{blue}} < \lambda_{\text{green}}$, $y_{1,\text{blue}} < y_{1,\text{green}}$. Reason is false because blue light has a shorter wavelength than green light, not longer.
Answer: (c)
From ISC 2026 Physics Paper 1, question 1(A)(vii).