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JEE Main202118 Mar 2021Evening ShiftPhysicsWaves and SoundActual

A galaxy is moving away from the earth at a speed of 286 km s - 1 . The shift in the wavelength of a red line at 630 nm is x × 10 - 10 m . The value of x , to the nearest integer, is ___ . [Take the value of the speed of the light c , as 3 × 10 8 m s - 1 ]

Correct answer

0

Step-by-step solution

⇒ Δ λ λ c = v , ⇒ Δ λ = v c × λ = 286 3 × 10 5 × 630 × 10 - 9 = 6 × 10 - 10   m

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