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Wave Optics — Physics STD 12 Science — Question

Rajasthan BoardEnglish MediumSTD 12 SciencePhysicsWave Optics1 Mark
Question
In the context of Doppler effect in light, the term ‘red shift’ signifies (a) Decrease in frequency(b) Increase in frequency(c) Decrease in intensity(d) Increase in intensity
   
   
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Answer

(a) Decrease in frequency

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