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  4. In a sngle slit diffraction pattern the angular width of a central maxima is 30° when the slit is illuminated by light of wavelength 6000 mathringA. Then width of the slit will be approximately given as:

Q. In a sngle slit diffraction pattern the angular width of a central maxima is when the slit is illuminated by light of wavelength . Then width of the slit will be approximately given as:

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Solution:

Angular width of central maxima in diffraction pattern is given as

Where we have



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1. Which of the following phenomena support the wave theory of light ?
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(b) interference
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(d) velocity of light in a denser medium is less than the velocity of light in the rarer medium

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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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