Which describes the correct procedure when converting a number from scientific notation to a standard notation if the power of 10 is -10? (egenuity experimental desing principles quiz)

(a. move the decimal point to the left) (B. move the decimal point to the right) (C. add 20 to the number) (D. subtract 20 from the number)

(B. move the decimal point to the right)

Explanation:

If we want to convert the exponent of a number written is standard notation from the power 10 to -10, we simply move the decimal point to the right.

For instance, to convert 1.23 * 10^1 to 10^-1, i just need to move the decimal two places to the right and i will have, 123 * 10^-1.

i don't know that i agree with that but what's the question ?

scattering of light by tiny particles in air to produce the colors we see on sky, is dependent on the following factors:

(i) wavelength of light

(ii) size of the scattering particle  

(iii) distance traveled by light through the atmosphere.

according to rayleigh's law of scattering, the amount of scattering is inversely proportional to the fourth power of its wavelength. shorter the wavelength, greater is its scattering. hence violet/blue light is scattered more than red.

sun's light is a composite light ( visible light) with wavelengths in the range 400 nm (violet) to 700 nm (red). as sunlight passes through our atmosphere, the molecules of air scatter light according to their wavelengths. during sunrise and sunset, the sun's position is below the horizon. hence light from the sun travels a greater distance in the atmosphere when compared to its position a noon.

as sunlight enters the earth's atmosphere, blue light is scattered away and at the end of its journey in the sky, only red and orange wavelengths remain in the beam.

hence at sunrise and sunset, the sky appears reddish orange.