I want viva questions for physics practical exam of LUCKNOW UNIVERSITY bSc 1st year

Confirmation of Stephen's Law by Electrical Method
1) State Stephen Law
The amount of thermal radiation emitted in each per unit area of ​​a black surface
The body is directly proportional to the fourth power of absolute temperature
2) What is a perfect black body?
A complete black body is one that completely absorbs the radiation of all wavelengths
Events about this remains the remains of 1
3) What is black body radiation?
A complete black body is heated to a high temperature, so it emits all radiations
Possible wavelength, thus the radiated emitted radiation is called black body radiation.
Full or total radiation is called
4) Define a body's immune power
At one particular temperature, the immune power of a body is defined because every energy is released.
Second.
5) Define Emissivity
Emissivity is defined as the ratio of the emissive power of a body to one's emissive power
Black body at the same temperature
6) Can an ideal black body be felt in practice?
A complete black body can not be realized in practice.
7) Name the black body commonly used for the use of precise work
Ferry black body designed by ferry
8) What is the radiation of heat?
With a straight line without affecting the process of transferring heat from one place to another
An intermediary medium is called radiation
9) What is thermal radiation?
Depending on the temperature of the body, radiated as radiation is called energy
Thermal radiation of energy
10) What is the speed with which the thermal radiation is traveling?
Thermal radiation travels with the speed of light, 3 x 108m / s
11) What is the wavelength series of thermal radiation?
The wavelength range of thermal radiation ranges from 8 x 10-7 meters to 3 x 10-4 meters
12) Can the thermal radiation travel through vacuum?
Yes thermal radiation can travel through a vacuum.
13) Name some events displayed by thermal radiation?
Thermal radiation displays reflection, refraction, interference, diffraction and polarization.
14) What is infrared radiation?
Infrared radiation is nothing from thermal radiation
15) Name the device to be used to detect the thermal radiation.
The radiometer or barometer is used to detect the thermal radiation.
16) Define a body's absorbed power.
The amount of thermal radiation is absorbed by the body at a given time
The total amount of thermal radiation incident at the same time, denoted by "A"
17) Define the transmission coefficient of one body
This is the ratio of the amount of thermal radiation that is transmitted by the body at certain times
The total amount of thermal radiation phenomenon at the same time, denoted by "T"
18) Define body reflection coefficient
This is the ratio of the amount of thermal radiation that is reflected by the body in total time
At the same time the amount of thermal radiation phenomenon is represented by "R".
19) What is the temperature of the sun surface calculated by using Stephen's law?
It's 5770