The distance between the two slits in a double-slit experimentis 0.04 mm. The se

Question

The distance between the two slits in a double-slit experimentis 0.04 mm. The second-order bright fringe (m = 2) ismeasured on a screen at an angle of 2.2° from the centralmaximum. What is the wavelength of the light? The distance between the two slits in a double-slit experimentis 0.04 mm. The second-order bright fringe (m = 2) ismeasured on a screen at an angle of 2.2° from the centralmaximum. What is the wavelength of the light? The distance between the two slits in a double-slit experimentis 0.04 mm. The second-order bright fringe (m = 2) ismeasured on a screen at an angle of 2.2° from the centralmaximum. What is the wavelength of the light?

Explanation / Answer

separation of the slits d = 0.04 * 10 ^ -3 m angle = 2.2 degrees condition for 2 nd bright fringe is d sin = 2 from this wavelength = d sin / 2                                   = 7.677 * 10 ^ -7 m                                   = 767.7 nm

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