Answer :

According to the planck’s law of radiation:

λ_{m} T = 0.29 cm K

or λ_{m} = 0.29/T cm K

where T is the temperature and λ_{m} is the maximum wavelength of the wave

for different values of maximum wavelengths such as λ_{m} = 10^{-4} cm, 5 × 10^{-5} cm and 10^{-6} cm, the values for temperatures can be calculated as follows:

T = 0.29/λ_{m} cm K

When, λ_{m} = 10^{-4} cm

T = 0.29/10^{-4} cm K

T = 2900 K

When, λ_{m} = 5× 10^{-5} cm

T = cm K

T = 5800 K

When, λ_{m} = 10^{-6} cm

T = 0.29/10^{-6} cm K

T = 290000 K

The above data shows that temperature is required to get radiations of different parts of electromagnetic spectrum and the temperature increases with decrease in the wavelength.

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