Speed of light in air is 3 x 10 m/s, determine the speed of light in the glass fibre.

What are similarities and differences between refraction, reflection, diffraction and absorption?

What is an aquifer for science class

This is a form of winter precipitation. it is frozen precipitation falling as ice pellets. snowflakes melt into raindrops as they pass through a thin layer of warmer air. the raindrops then refreeze into particles of ice when they fall into a layer of sub-freezing air near the surface of the earth. this precipitation is called a) hail. b) rain. c) sleet. d) snow.