All radiations in a black body are___________________?

Related Mcqs:

Sensible heat is the heat required to __________________?

A. change vapour into liquid B. change liquid into vapour C. increase the temperature of a liquid of vapour D. convert water into steam and superheat it E. convert saturated steam into dry steam...

Heat is transferred by all three modes of transfer, viz, conduction, convection and radiation in _________________?

A. electric heater B. steam condenser C. melting of ice D. refrigerator condenser coils E. boiler...

Emissivity of a white polished body in comparison to a black body is________________?

A. higher B. lower C. same D. depends upon the shape of body E. none of the above...

The value of the wavelength for maximum emissive power is given by ___________________?

A. Wien’s law B. Planck’s law C. Stefan’s law D. Fourier’s law E. Kirchhoff’s law...

40% of incident radiant energy on the surface of a thermally transparent body is reflected back. If the transmissivity of the body be 0.15, then the emissivity of surface is____________________?

A. 0.45 B. 0.55 C. 0.40 D. 0.75 E. 0.60...