23.
Give reasons -
a)The 'danger' signal lights are red in colour,
b)Why the planets do not twinkle
c)Explain diagrammatically the process of dispersion of white light by glass prism.
24.
a)How is nuclear energy generated ? Explain the use and misuse of nuclear energy
b)Give description of conventional sources of energy.
Answers
HEYA MATE HERE IS UR ANSWER
A) The primary reason why the color red is used for danger signals is that red light is scattered the least by air molecules. The effect of scattering is inversely related to the fourth power of the wavelength of a color. ... So red light is able to travel the longest distance through fog, rain, and the alike.
B) The answer is the planets actually do twinkle. In fact, everything outside our atmosphere, anything we're looking at outside your atmosphere does twinkle due to the effect that we discussed. However, we can't notice the twinkling effect of the planets because planets appear bigger in size to us..
C) check this answer in attachment..
24.
A) Nuclear energy originates from the splitting of uranium atoms – a process called fission. This generates heat to produce steam, which is used by a turbine generator to generate electricity. Because nuclear power plants do not burn fuel, they do not produce greenhouse gas emissions.
Its misuses - The radioactive waste can possess a threat to the environment and is dangerous for humans. We all remember the Chernobyl accident, where the harmful effects of nuclear radiation on humans can even be witnessed today.
B) When we cannot reuse a source of energy after using it once we call them “conventional sources of energy” or “non-renewable energy resources”. They are the most important conventional sources of energy. These include coal, petroleum, natural gas and nuclear energy.
HOPE IT HELPS UH ♡
Explanation:
here is your answer sis
