Advertisements
Advertisements
Question
If the earth did not have atmosphere, would its average surface temperature be higher or lower than what it is now? Explain.
Advertisements
Solution
In the absence of atmosphere, there would be no greenhouse effect on the surface of the Earth. As a result, the temperature of the Earth would decrease rapidly, making it difficult for human survival.
APPEARS IN
RELATED QUESTIONS
A wave has wavelength 50 Å.
- Name the wave.
- State its speed in vacuum.
- State its one use.
What is the range of the wavelength of the following electromagnetic waves?
(a) Gamma rays.
Name the radiations of wavelength just shorter than 4 × 10-7 m.
Answer briefly.
Give two uses of radio waves.
Solve the numerical problem.
Calculate the wavelength in nm of an X-ray wave of frequency 2.0 × 1018 Hz.
Name the e.m. waves which are suitable for radar systems used in aircraft navigation. Write the range of frequency of these waves.
A car is moving towards a high cliff. The car driver sounds a horn of frequency f. The reflected sound heard by the driver has a frequency 2f. If v be the velocity of sound, then the velocity of the car, in the same velocity units, will be:
The ozone layer absorbs
Name one radiation having the wavelength longer than the wavelength of these radiations.
