For a grey surface – McqOptions

MCQOPTIONS

1.	For a grey surface
A.	Reflectivity equals emissivity
B.	Emissivity equals transmissivity
C.	Absorptivity equals reflectivity
D.	Emissivity is constant
Answer» E.

Discussion

No Comment Found

Related MCQs

Electromagnetic waves strikes a hot body maintained at 900 degree Celsius which has a reflectivity of 0.66 and a transmissivity of 0.022. Let the absorbed flux be 60 W/m2. Determine the rate of incident flux
Absorptivity of a body is equal to its emissivity
Let 220 W/m2 of radiant energy is absorbed by a convex surface, 90 W/m2 is reflected and 40 W/m2 is transmitted through it. What is the value of absorptivity?
Energy strikes a vertical hemispherical plate with an intensity of 640 W/m2. The absorptivity is thrice the transmissivity and twice the reflectivity. Determine the rate of absorption
The absorptivity of a surface depends upon(i) Direction of reflected radiation(ii) Temperature of the surface(iii) CompositionIdentify the correct statements
Energy strikes a vertical hemispherical plate with an intensity of 640 W/m2. The absorptivity is thrice the transmissivity and twice the reflectivity. Determine the rate of transmission
ABSORPTIVITY_OF_A_BODY_IS_EQUAL_TO_ITS_EMISSIVITY?$
Electromagnetic_waves_strikes_a_hot_body_maintained_at_900_degree_Celsius_which_has_a_reflectivity_of_0.66_and_a_transmissivity_of_0.022._Let_the_absorbed_flux_be_60_W/m<sup>2</sup>._Determine_the_rate_of_incident_flux$
Which quantity can be neglected for gases?
For a grey surface