Question

The period of revolution, of the electron, in Bohr’s fourth orbit is [m, e, 0 and h are given]​

Answer 1

Answer:Time period of a revolution is given by,

T=  

V

2πr

​  

 

and we know that radius, r is given by  

r=  

4π  

2

mkZe  

2

 

n  

2

h  

2

 

​  

 

Similarly, velocity v is given by

V=  

nh

2πkZe  

2

 

​  

 

Substituting values of r and v, we get,

T=  

4π  

2

mkZe  

2

 

2πn  

2

h  

2

 

​  

=  

nh

2πkZe  

2

 

​  

 

T=(c)n  

3

 

orT∝n  

3

 

&ifn=1T  

1

​  

=1

n=2T  

2

​  

=8

→T  

1

​  

:T  

2

​  

=1:8

Explanation: