MHT CET · Physics · Wave Optics
In Fraunhofer diffraction pattern, slit width is 0.2 mm and screen is at 2 m away from the lens. If the distance between the first minimum on either side of the central maximum is 1 cm , the wavelength of light used is
- A \(2000 Å\)
- B \(4000 Å\)
- C \(5000 Å\)
- D \(10000 Å\)
Answer & Solution
Correct Answer
(C) \(5000 Å\)
Step-by-step Solution
Detailed explanation
\(\lambda = \frac{a y_1}{D}\) \(\lambda = \frac{(0.2 \times 10^{-3} \, \text{m})(0.005 \, \text{m})}{2 \, \text{m}}\)
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