Radiation : Processes And Properties Questions And Answers.


1.The value of transmissivity may vary from?
A. 4-5
B. 3-4
C. 1-2
D. 0-1

2.A cavity with a small hole will always behave as a?
A. Opaque body
B. Black body
C. Transparent body
D. White body

3.What is the wavelength band of gamma rays?
A. 4 * 10 -7 to 1.4 * 10 -4 micron meter
B. 3 * 10 -7 to 3.4 * 10 -4 micron meter
C. 2 * 10 -7 to 2.4 * 10 -4 micron meter
D. 1 * 10 -7 to 4 * 10 -4 micron meter

4.Transmissivity is defined as?
A. Fraction of total energy transmitted by the body
B. Fraction of total energy reflected by the body
C. Fraction of total energy absorbed by the body
D. Fraction of total energy absorbed and radiated by the body

5.Radiant energy with an intensity of 800 W/m 2 strikes a flat plate normally. The absorptivity is thrice the reflectivity and twice the transmissivity. Determine the rate of transmission?
A. 125.47 W/m 2
B. 135.47 W/m 2
C. 145.47 W/m 2
D. 155.47 W/m 2

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