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In an atom, two electrons move around nu...

In an atom, two electrons move around nucleus in circular orbits of radii ( R) and ( 4R) . The ratio of the time taken by them to complete one revolution is :

A

`1/64`

B

`1/8`

C

`4/1`

D

`2/1`

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The correct Answer is:
B
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TARGET PUBLICATION-ATOMS, MOLECULES AND NUCLEI -Critical Thinking
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  16. The first line of Balmer series has wvaelength 6563 Å. What will be th...

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  19. The wavelength of emitted radiation in terms of R (the Rydberg constan...

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