Answer :

According to the planck’s law of radiation:

λm T = 0.29 cm K

or λm = 0.29/T cm K

where T is the temperature and λm is the maximum wavelength of the wave

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

T = 0.29/λm cm K

When, λm = 10-4 cm

T = 0.29/10-4 cm K

T = 2900 K

When, λm = 5× 10-5 cm

T = cm K

T = 5800 K

When, λm = 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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