The sum of reflectivity and absorptivity for an opaque body is equal to

Related MCQs

• Depending on the radiating properties, a body will be opaque when (where a = absorptivity, p = reflectivity, X = transmissivity.)
• If the absorptivity plus reflectivity of a body equals 1, then the body is known as
• Absorptivity and reflectivity of a perfect black body are respectively
• Depending on the radiating properties, a body will be white when (where a = absorptivity, p = reflectivity, x = transmissivity)
• Depending on the radiating properties, a body will be black when (where a = absorptivity, p == reflectivity, X = transmissivity.)
• Absorptivity of a perfect black body is unity. Which of the following has maximum absorptivity?
• When a body is in thermal equilibrium with its surroundings, the absorptivity and the emissivity of the body are same. This Law is known as
• Absorptivity of a body will be equal to its emissivity
• The absorptivity of a body is equal to its emissivity
• The emissivity of a body will be equal to absorptivity when