Q.

Depending on the radiating properties, body will be transparent when (Where a = absorptivity, p = reflectivity, x = transmissivity)

• AP = 0, x = 0 and a = 1
• BP=1, x = 0, and a = 0
• CP = 0, x= 1, and a = 0
• DX = 0, a + p = 1