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  4. A radar operates at wavelength 50.0 cm. If the beat freqency between the transmitted singal and the singal reflected from aircraft (Δ v) is 1 kHz, then velocity of the aircraft will be :

Q. A radar operates at wavelength . If the beat freqency between the transmitted singal and the singal reflected from aircraft is , then velocity of the aircraft will be :

Wave Optics Report Error

Solution:

When source is fixed and observer is moving towards it, by Doppler's effect the apparent frequency is given as

When source is moving towards observer at rest, we use





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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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