Light incident on a lake surface is partly reflected and partly refracted. how is the reflected ray different from the incident ray

True or false: the revolution of the earth creates day and night as it rotates around the sun

Imagine you are standing in the antarctic during the southern hemisphere summer. the sky is clear and blue. there are no clouds in the sky. your shadow is cast on the icy ground. what is the color of the shadow?

Find the dimensions and area of the largest rectangle that can be inscribed in the upper half of the ellipse. (give your answers in terms of a and b. enter the dimensions as a comma-separated list.)