CUET · PHYSICS · PYQ PAPER 2025
In an interference experiment, the two slits are 1 mm apart and the screen is placed 1 m away from the slits.
The width of a bright fringe for the light of wavelength 500 nm is
- A 0.25 mm
- B 5.0 mm
- C 0.5 mm
- D 2.5 mm
Answer & Solution
Correct Answer
(C) 0.5 mm
Step-by-step Solution
Detailed explanation
\( \beta = \frac{\lambda D}{d} \) \( \beta = \frac{(500 \times 10^{-9} \text{ m})(1 \text{ m})}{1 \times 10^{-3} \text{ m}} \) \( \beta = 0.5 \times 10^{-3} \text{ m} = 0.5 \text{ mm} \)
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