When sunlight strikes oil on the surface of water, a variety of colors are observed. what is the best explanation for this observation? a) oil reflects the light and the lens of our eyes break it into component colors. b) oil has a very high index of refraction, trapping and reflecting the visible spectrum. c) the components of white light are refracted at different angles due to their various wavelengths. d) the visible spectra of white light travel at different speeds, reaching the oil separately so we see the component colors.

C) The components of white light are refracted at different angles due to their various wavelengths.

Explanation: As oil is denser than water, it floats over water. Both upper and lower layers of oil can reflect light and the two reflected rays undergo interference.

As the thickness of oil decreases on moving from center to periphery, the color of the reflected light differs. Moreover the angle of incidence of light also affects the color of light. Thus we see different colors corresponding to different wavelengths.

answer: the metamorphic rocks are formed when they are exposed to high pressure and high temperatures. this happens when one of the earth's plates comes in contact with the other plate by traveling in opposite directions, straight into each other or slipping under one another. the friction that is caused by this activity results in   melting of rocks and when it cools they are known as metamorphic rocks. this process needs a controlled amount of pressure and temperature otherwise it may turn into magma.