Home
Class 12
PHYSICS
Earth is moving towards a fixed star wit...

Earth is moving towards a fixed star with a velocity of `30 kms^(-1)`. An observer on earth observes a shift of `0.58 Å` in wavelength of light coming from star. What is the actual wavelength of light emitted by star ?

A

5800 Ã…

B

2400 Ã…

C

12000 Ã…

D

6000 Ã…

Text Solution

Verified by Experts

The correct Answer is:
A
Using , `triangle lambda = (v)/(c) lambda`
Here,`v= =30kms^(-1)=30xx10^(3)ms^(-1)`
`c=3xx10^(8)ms^(-1) triangle lambda=0.58 Ã…`
` :. lambda=(c)/(v).triangle lambda=(3xx10^(8))/(30xx10^(3))xx0.58=5800Ã…`
Promotional Banner

Topper's Solved these Questions

  • WAVE OPTICS

    NCERT FINGERTIPS|Exercise Coherent And Incoherent Addition Of Waves|7 Videos

  • WAVE OPTICS

    NCERT FINGERTIPS|Exercise Interference Of Light Waves And Young'S Experiment|40 Videos

  • WAVE OPTICS

    NCERT FINGERTIPS|Exercise Assertion And Reason|15 Videos

  • SEMICONDUCTOR ELECTRONICS : MATERIALS , DEVICES AND SIMPLE CIRCUITS

    NCERT FINGERTIPS|Exercise Assertion And Reason|15 Videos

Similar Questions

Explore conceptually related problems

A star is going away from the earth. An observer on the earth will see the wavelength of light coming from the star

A distant star is moving constantly towards the Earth at a speed of 2.3 xx 10^4 ms^(-1) . A shift of 0.5 Å in wavelengths is observed from the Earth. Calculate the actual value of wavelength emitted from the star if the Earth is considered at rest with respect to the distant star.

The apparent wavelength of light from a star moving away from the earth is 0.02% more than the actual wave length. What is the velocity of star

A star is moving away form the earth with a velocvity of 100 km/s. then the shift of its spectral line of wavelength 5700 Å due to Doppler effect will be

A star is moving away from the obsever on the Earth with a speed of 400 km/s. What will be the Doppler shift if the wavelength of light emitted by the star is 5800 Å ?

Light of wavelength lamda is coming from a star. What is the limit of resolution of a telescope whose objective has diameter?

If the wavelength of light emitted by a star is shifted towards red end, then the star is -