The wavelength of sodium lamp is observe...

The wavelength of sodium lamp is observed to be 2886 `A^@` from earth and original wavelength was 2880 `A^@`.Find speed of galaxy

`3 × 10^5 ms^-1`

`4 ×10^5 ms^-1`

`6.25×10^5 ms^-1`

none

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JEE MAINS PREVIOUS YEAR-JEE MAIN 2021-PHYSICS SECTION B

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