[W]? 4. A car changes its position from 52 km [W] to 139 km (E).
What is the car's displacement?

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?

Hi , i am new here can anyone me out with this question why is space black after having so many shining objects like sun , moon , stars

Answer on edg: what happens to the light coming from the sun? - scattering what happens to light on the surface of water? - specular reflection what happens to light on the surfaces of rocks? - diffuse reflection