Assuming that the universe is expanding,if the spectrum of light coming from a star which is moving away from the Earth is tested,then in the wavelength of light:
- AThere will be no change.
- BThe spectrum will shift to the infrared region.
- CThe spectrum will shift to the ultraviolet side.
- DNone of the above.
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In the hydrogen spectrum,the wavelength of the ${H_\alpha}$ line is $656 \ nm$,whereas in the spectrum of a distant galaxy,the ${H_\alpha}$ line wavelength is $706 \ nm$. The estimated speed of the galaxy with respect to the Earth is:
MediumIIT 1999
View Solution$A$ star emitting light of wavelength $5896 \ \mathring{A}$ is moving away from the earth with a speed of $3600 \ km/s$. The wavelength of light observed on earth will be:
($c = 3 \times 10^8 \ m/s$ is the speed of light)
($c = 3 \times 10^8 \ m/s$ is the speed of light)
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View SolutionWhat is the Doppler effect for light? Derive the formula for the Doppler shift.
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View Solution$A$ galaxy is moving away from the Earth such that a spectral line at $600 \ nm$ is observed at $601 \ nm$. Then,the speed of the galaxy with respect to the Earth is (in $km \ s^{-1}$)
$A$ galaxy is moving away from the Earth at a speed of $286 \, km/s$. The shift in the wavelength of a red line at $630 \, nm$ is $x \times 10^{-10} \, m$. The value of $x$,to the nearest integer,is........
[Take the value of speed of light $c$ as $3 \times 10^{8} \, m/s$]
[Take the value of speed of light $c$ as $3 \times 10^{8} \, m/s$]
DifficultJEE MAIN 2021
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