SOLAR SYSTEM

UNIVERSE

SATELLITESICY BODIES

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
Mechanisms used to protect from thermal radiation
A
mirror
B
shield
C
blankets
D
all the above
Explanation: 

Detailed explanation-1: -Turns out there are four methods for body heat loss: radiation, conduction, convection and evaporation.

Detailed explanation-2: -Thermal radiation is generated when heat from the movement of charges in the material (electrons and protons in common forms of matter) is converted to electromagnetic radiation. Sunshine, or solar radiation, is thermal radiation from the extremely hot gasses of the sun, and this radiation heats the earth.

Detailed explanation-3: -Repair or plug fixed openings. If that is not possible, use a radiation shield such as an alloy sheet or ceramic board. Use proper refractory or insulation to plug holes. For openings such as a sight glass, use a damper or slide valve to block radiation when using the sight glass.

Detailed explanation-4: -Without this difference, no heat transfer can take place. Heat can be transferred in three ways: by conduction, by convection, and by radiation.

Detailed explanation-5: -A thermopile is a sensitive instrument, used for detection of heat radiation and measurement of their intensity.

Detailed explanation-6: -The heating of the Earth by the Sun is an example of transfer of energy by radiation. The heating of a room by an open-hearth fireplace is another example. The flames, coals, and hot bricks radiate heat directly to the objects in the room with little of this heat being absorbed by the intervening air.

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