Question

A common radio wavelength observed coming from astronomical objects is 21 cm. what temperature is associated with this radiation? 1st attempt See Hint Feedback 13.8

Answer 1

`T = 1.38* 10^(-2) K`

Step-by-step explanation:

Given data:

wavelength = 21 cm

from wein's displacement relation we have

`\lambda_(max) = (b)/(T)`

Where,

b is wein's constant and it is given as
`2.89 * 10^(−3) m⋅K`

and T is temperature of radiation ,
`\lambda_(max)` represent wavelength

Putting all value in the above equation to obtained desired temperature value

`T = (b)/(\lambda_(max))`

`T = (2.89* 10^(-3))/(0.21)`

`T = 1.38* 10^(-2) K`