Angular width of central maxima in the Fraunhoffter diffraction pattern of a slit is measured. The slit is illuminated by light of wavelength . When the slit is illuminated by light of another wavelength, the angular width decreases by 30%. The wavelength of this light will be |
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a) |
b) |
c) |
d) |

Angular width of central maxima in the Fraunhoffter diffraction pattern of a slit is measured. The slit is illuminated by light of wavelength . When the slit is illuminated by light of another wavelength, the angular width decreases by 30%. The wavelength of this light will be |
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a) |
b) |
c) |
d) |

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