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Question: Two electrons are revolving around a nucleus at distances ‘r’ and ‘4r’. The ratio of their periods i...

Two electrons are revolving around a nucleus at distances ‘r’ and ‘4r’. The ratio of their periods is –

A

1 : 4

B

4 : 1

C

8 : 1

D

1 : 8

Answer

1 : 8

Explanation

Solution

n12n22\frac { \mathrm { n } _ { 1 } ^ { 2 } } { \mathrm { n } _ { 2 } ^ { 2 } }Ž 12\frac { 1 } { 2 }

n13n23\frac { \mathrm { n } _ { 1 } ^ { 3 } } { \mathrm { n } _ { 2 } ^ { 3 } }=18\frac { 1 } { 8 }