AP EAMCET · PHYSICS · Wave Optics
A narrow slit of width 2 mm is illuminated with a monochromatic light of wavelength 500 nm. If the distance between the slit and the screen is 1 m, then first minima are separated by a distance of
- A 5 mm
- B 0.5 mm
- C 1 mm
- D 10 mm
Answer & Solution
Correct Answer
(B) 0.5 mm
Step-by-step Solution
Detailed explanation
\( \Delta y = \frac{2\lambda D}{a} \) \( \Delta y = \frac{2 \times 500 \times 10^{-9} \text{ m} \times 1 \text{ m}}{2 \times 10^{-3} \text{ m}} \) \( \Delta y = 0.5 \times 10^{-3} \text{ m} = 0.5 \text{ mm} \)
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