Coherent electromagnetic radiation is sent through a slit of width 0.0100 mm. For which of the following wavelengths will there be no points in the diffraction pattern where the intensity is zero? (a) Blue light of wavelength 500 nm; (b) infrared light of wavelength 10.6 mm; (c) microwaves of wavelength 1.00 mm; (d) ultraviolet light of wavelength 50.0 nm.

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Simekr7 · Accepted Answer

a) when the wavelength of blue light is   λ  =  500   nm  =  500  ×      10          −      9         m    =  0.5  ×      10          −      6         mSo wavelength is smaller than d so intensity will not zero.b) when the wavelength of infrared light is   λ  =  10.6  μ  m    =  10.6  ×      10          −      6           mHere wavelength is greater than d so intensity will zero for this case.

Miguel Mathis · Accepted Answer

c) when the wavelength of microwave is   λ  =  1  μ  m    =  1  ×      10          −      6           mSo wavelength is smaller than d so intensity will not zero.d) when the wavelength of ultraviolet ray is   λ  =  50  ×      10          −      9        m    =  0.05  ×      10          −      6           m

Coherent electromagnetic radiation is sent through a slit of width 0.0100 mm.

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