Consider the following statements about a microscope and a telescope.

1. Both the eyepiece and the objective of a microscope are convex lenses.

2. The focal length of the objective of a telescope is larger than the focal length of its eyepiece.

3. The magnification of a telescope increases with the increase in focal length of its objective.

4. The magnification of a microscope increases with the increase in focal length of its objective.

Which of the statement(s) given above are correct?

A planet has a mass M₁ and radius R¹. The value of acceleration due to gravity on its surface is g₁.

There is another planet 2, whose mass and radius both are two times that of the first planet. Which one of the following is acceleration due to gravity on the surface of planet 2 ?

The wavelength of X-rays is of the order of

Consider the following velocity and time graph

Image

Which one of the following is the value of average acceleration from 8 s to 12 s ?