engineering recuitment BPSC AE Mock Test 2025 Heat Transfer Radiation Properties of Surface Emission
The thermal radiations occur in the portion of electromagnetic spectrum between the wavelengths
1
10–2 micron to 10–4 micron
2
10–1 micron to 10–2 micron
3
0.1 micron to 102 micron
4
102 micron onwards