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A rocket goes away from Earth at speed o...

A rocket goes away from Earth at speed of `6 xx 10^(7) m//s` and it has blue light in it, what will be the wavelength of light observed by observer at Earth? Wavelength of blue ligth `=4600 Å`

A

`4600Å`

B

`5520Å`

C

`3860Å`

D

`3920Å`

Text Solution

Verified by Experts

The correct Answer is:
B
`(Delta lambda)/(lambda)=(v)/(c)=(6xx10^(7))/(3xx10^(8))=0.2`
`:. Deltalambda= lambda.-lambda`
`:. lambda.=1.2 lambda`
`=1.2xx4600Å`
`:. Lambda.=5520Å`
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KUMAR PRAKASHAN-WAVE OPTICS-SECTION-D (MULTIPLCE CHOICE QUESTIONS (MCQS)) (MCQS FROM DARPAN BASED ON TEXTBOOK)
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  6. The star recedes from the earth at the speed a 100 kms^(-1) Find the d...

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  7. In doppler effect of light, term red shift represents ......

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  8. Speed of light wave of 5000 Å wavelength produced from a star is 1.5 x...

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  9. Displacement of two light waves are e(1)=4 sin omega t and e(2)= 3 sin...

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  10. Ratio of amplitude of two coherent sources is 5:2. Ratio of intensity ...

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  11. Intensity of two sources are different and waves emitting from source ...

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  14. Write the condition of destructive interference in terms of phase diff...

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  15. Write the condition for constructive interfernce in terms of path diff...

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  16. Write the condition of destructive interference in terms of path diffe...

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