The sun is less bright at morning and evening as compared to at noon although its distance from the observer is almost the same. Why ?

How does the period of revolution of a planet around the sun vary with its distance from the sun?

Why does a person sweat more at Mumbai as compared to one in Delhi even when the temperature of the two towns is the same?

A planet is revolving in an elliptical orbit around the sun. Its closest distance from the sun is r and the farthest distance is R. If the velocity of the planet nearest to the sun be v and that farthest away from the sun be V. then v/V is

A planet is revolving in an elliptical orbit around the sun. Its closest distance from the sun is r and the farthest distance is R. If the velocity of the planet nearest to the sun be v and that farthest away from the sun be V. then v/V is