Describe the difference between red light and blue light.
1 answer:
Answer:
Red light has longer wavelength, while blue light has higher frequency
Explanation:
Red light and blue light corresponds to two different portion of the visible part of the electromagnetic spectrum.
The two colors have different wavelengths - more precisely:
Blue: 450 - 500 nm
Red: 620 - 750 nm
So, we see that red light has a longer wavelength than blue light.
Moreover, the frequency of an electromagnetic wave, f, is inversely proportional to the wavelength, :
where c is the speed of light. This means that blue light, which has a shorter wavelength, has a higher frequency than red light.
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Answer:
Explanation:
We shall take the help of vector form of displacement . Taking east as i and north as j
4.0m N = 4 j
7.5 m E = 7.5 i
6.8 m S = - 6.8 j
3.7 m E, = 3.7 i
3.6 m S = - 3.6 j
5.3 m W = - 5.3 i
3.7 m N, = 3.7 j
5.6 m W = - 5.6 i
4.4 m S = - 4.4 j
4.9 m W = - 4.9 i
Total displacement = 4j +7.5 i -6.8j+3.7i-3.6j-5.3i+3.7j-5.6i-4.4j-4.9i
= -4.6 i -7.1 j
magnitude of displacement =
= 8.46 m
Direction
Tanθ = 7.1/ 4.6
θ = 57⁰ south of west .
distance walked = 4+7.5 +6.8+3.7+3.6+5.3+3.7+5.6+4.4+4.9
= 49.5 m