How much water is on the earth

Amichelson interferometer operating at a 600 nm wavelength has a 3.02-cm-long glass cell in one arm. to begin, the air is pumped out of the cell and mirror m2 is adjusted to produce a bright spot at the center of the interference pattern. then a valve is opened and air is slowly admitted into the cell. the index of refraction of air at 1.00 atm pressure is 1.00028.how many bright-dark-bright fringe shifts are observed as the cell fills with air?

What is the difference between a solar cell and a solar panels

The first step in cloud formation a) warmed air cools and condenses. b) solar energy causes warm air to rise. c) solar energy causes water vapor to condense.