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The 6563 Å H(2) line emitted by hydrogen...

The `6563 Å H_(2)` line emitted by hydrogen in a star is found to be red shifted by `15 Å`. Estimate the speed with which the star is receding from earth.

A

`17.3xx10^(3) m//s`

B

`4.29xx10^(7) m//s`

C

`3.39xx10^(5)`m/s

D

`2.29xx10^(5)`m/s

Text Solution

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The correct Answer is:
D
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AAKASH INSTITUTE-WAVE OPTICS-Assignment (Section-A (objective type question(one option is correct)))
  1. In Young's double slit experiment, when two light waves form third min...

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  2. It is believed that the universe is expanding and hence the distant st...

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  3. The 6563 Å H(2) line emitted by hydrogen in a star is found to be red ...

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  4. In the context of Doppler effect in light, the term red shift signifie...

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  5. A slit of width is illuminated by white light. For red light (lambda=6...

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  6. The bending of light about corners of an obstacle is called

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  7. Angular width (beta) of central maximum of a diffraction pattern on a ...

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  8. Red light is generally used to observe diffraction pattern from single...

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  9. When a compact disc is illuminated by a source of white light, coloure...

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  10. For what distance is ray optics a good approximation when the aperture...

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  11. To observe diffraction, the size of the obstacle

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  12. In a single slit diffraction pattern

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  13. Diffraction and interference of light refers to -

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  14. The limit of resolution of an optical instrument arises on account of

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  15. A polariser in used to

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  16. Light waves can be polarised as they are

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  17. Through which character we can distiguish the light waves from sound w...

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  18. The angle of polarisation for any medium is 60^(@) , what will be crit...

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  19. Which of the following cannot be polarised?

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  20. Unpolarised light of intensity I is passed through a polaroid. What is...

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