Two bodies of same shape, same size and same radiating power have emissivities 0.2 and 0.4 The ratio of their temperature is .

Two bodies of same shape, same size and same radiating power have emissivities 0.2 and 0.8. The ratio of their temperatures is

Are all flowers of the same size and shape ?

Two bodies A and B having same surface areas have emmissivities of 0.01 and 0.49 respectively. The two bodies emit total radiant power at the same rate. The wavelength A8 corresponding to maximum spectral radiancy 111 the radiation from B shifted from the wavelength corresponding to maximum spectral radiancy in the radiation from A by 1 µm. Jf temperature of A is 5200 K then,

Two electric lamps A and B radiate the same power. Their filaments have the same diemensions, and have emissivities. e_(A) and e_(B) . Their surface tempratures are T_(A) an T_(B) . The ratio T_(A)//T_(B) will be equal to

Two electric lamps A and B radiate the same power. Their filaments have the same diemensions, and have emissivities. e_(A) and e_(B) . Their surface tempratures are T_(A) an T_(B) . The ratio T_(A)//T_(B) will be equal to

Two electric lamps A and B radiate the same power. Their filaments have the same diemensions, and have emissivities. e_(A) and e_(B) . Their surface tempratures are T_(A) an T_(B) . The ratio T_(A)//T_(B) will be equal to

Two objects A & B have exactly the same shape and are radiating the same power If their temperatures are in the ratio sqrt3 : 1 then the ratio of their emissivities is .

Two balls of same material and same surface finish have their diameters in the ratio 1:2. They are heated to the same temperature and are left in a room to cool by radiation, then the initial rate of loss of heat