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  4. Light of wavelength 6000 mathringA is normally incident on a slit. Angular position of second minimum from central maximum us 30°. Width of the slit should be :

Q. Light of wavelength is normally incident on a slit. Angular position of second minimum from central maximum us . Width of the slit should be :

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Solution:

For diffraction minima due to a single slit of width , we use





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2. In Young's double slit experiment, how many maxima can be obtained on a screen (including central maxima), if (where is the wavelength of light)?

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3. Light of wavelength is incident normally on a slit of width . The angular width of central maxima in the diffraction pattern is (measured from minimum to minimum)

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4. Using monochromatic light of wavelength , an experimentalist sets up the Young's double slit experiment in three ways as shown.
If she observes that y = the wavelength of light used is :

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5. At two points P and Q on a screen in Young's double slit experiment, waves from slits and have a path difference of 0 and respectively. The ratio of intensities at P and Q will be :

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