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Coherent light of wavelength 400.0nm shines through a slit which divides a metal strip of lenght...

Coherent light of wavelength 400.0nm shines through a slit which divides a metal strip of lenght L at the middle.the bright region between the first dark fringes has a width 15.0cm on a screen 12,0m away. given that the coefficient of linear expansion of the metal strip is 3.0 x 10-7 °C-1 and L = 1.0m and assuming that the metal strip can only expand or contract at the slit, calculate the width of the bright region after the temperature of the strip decreases by 50.0°C

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Answer #1

Therefore width of bright region = 2×7.62 cm = 15.24 cm

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