| Assertion (A): Fringes of interference pattern produced by blue light is narrower than that produced by red light. |
| Reason (R): In Young's double slit experiment, fringe width = \[\lambda \operatorname{D}/d\] |
A) Both A and R are true and R is the correct explanation of A
B) Both A and R are true but R is NOT the correct explanation of A
C) A is true but R is false
D) A is false and R is true
Correct Answer: C
Solution :
| Option [c] is correct. |
| Explanation: Fringes of interference pattern produced by blue light is narrower than that produced by red light. The assertion is true. |
| Fringe width = \[\lambda \]D/d. Since blue light has wavelength smaller than that of red light, blue light produces narrower fringes. So, reason is also true and explains the assertion. |
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