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 ?

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

Interference fringes are observed on a screen by illuminating two thin slits 1 mm apart with a light source (lambda=632.8 nm) . The distance between the screen and the slits is 100 cm. If a bright fringes is observed on a screen at a distance of 1.27 mm from the central bright fringe , then the path difference between the waves , which are reaching this point from the slits is close to :

A tower stands near an airport. The angle of elevation theta of the tower from a point on the ground such that its tangent is 5/12 . Find the height of the tower, if the distance of the observer from the tower is 120m.

Why does moon have very cold and very hot temperature variations e.g., from -190^(@)C to 110^(@)C even though it is at the same distance from the sun as the earth is?

The largest and the shortest distance of the earth from the sun are r_(1) and r_(2) , its distance from the sun when it is at the perpendicular to the major axis of the orbit drawn from the sun

A planet is revolving around the Sun in an elliptical orbit. Its closest distance from the Sun is r and farthest distance is R . If the orbital velocity of the planet closest to the Sun is v , then what is the velocity at the farthest point?

If the earth be one-half of its present distance from the sun, how many days will be in one year ?

In Young's double-slit experiment, the slit are 0.5 mm apart and the interference is observed on a screen at a distance of 100 cm from the slits, It is found that the ninth bright fringe is at a distance of 7.5 mm from the second dark fringe from the center of the fringe pattern. The wavelength of the light used in nm is

Two satellites A and B of the same mass are revolving around the earth in the concentric circular orbits such that the distance of satellite B from the centre of the earth is thrice as compared to the distance of the satellite A from the centre of the earth. The ratio of the centripetal force acting on B as compared to that on A is