A slit of width d is illuminated by white light. The first minimum for red light ( = 6500…
Physics · Class 12 · CBSE — Wave Optics
A slit of width d is illuminated by white light. The first minimum for red light (\(\lambda = 6500\) Å) will fall at \(\theta = 30°\) when d will be
- 3200 Å
- 6.5 × 10–4 mm
- 1.3 micron
- 2.6 × 10–4 cm
Answer
(C) 1.3 micron
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