How can you find the age of a layer of rock that is surrounded by layers of volcanic ash

Radiometric dating method

Explanation:

The radiometric dating method is usually defined as a technique that is commonly used by the geologists in order to determine the age of the rocks based on the presence of radioactive elements or substances. These radioactive elements are comprised of unstable radioactive isotopes that release harmful radiations as it alters from an unstable condition to a stable one. They undergo decay at a definite rate which is known as the decay rate. For different rocks, this rate of decay is different.

The age of the rock layers can be determined by dating the rocks forming the layers. This will give a somewhat approximate age of the rocks.

3

step-by-step explanation:

10 - 2.8 = 7.2

2 2/5 = 2.4

7.2 / 2.4 = 3

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.