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All objects are continually absorbing and emitting infrared radiation. Black bodies are perfect absorbers and emitters of radiation.
Which word describes the process of giving out radiation?
Which word describes the process of taking in radiation?
Which colour is the best absorber of radiation?
Which colour is the worst emitter?
What is a black body?
A perfect absorber but poor emitter
A poor absorber but perfect emitter
A perfect absorber and perfect emitter
What happens to the temperature of a body that absorbs infrared radiation faster than it emits?
It remains constant
What happens to the temperature of a body that absorbs and emits infrared radiation at the same rate?
How much radiation does a perfect black body transmit?
100% of the radiation falling on it
50% of the radiation falling on it
None of the radiation falling on it
Which of these is a factor that affects the average temperature of the Earth?
Concentration of greenhouse gases
The time of year
Cosmic rays from the Sun
Which is NOT a consequence of visible light and high frequency infrared radiation being absorbed by the surface of the Earth?
The Earth’s internal energy increases
The Earth’s surface gets hotter
The Earth expands