Question

Which of the following statements are true?

O . The length of a microscope is equal to the sum of the focal lengths of the eyepiece & objective.

O . The purpose of a large primary mirror in a telescope is to have a large magnification.

O . Better resolution is achieved with larger wavelengths. Far-sighted people use diverging lenses to correct their vision.

O . Nearsighted people see close up objects in focus.

O . For a telescope, the smaller fe is, the greater the magnification.

Answer 1

For the 1st part- The length of microscope is the distance between objective and eye peice.

For 2nd Part- It is False as the large primary mirrors are used to see objects brighter not the magnified.

For 3rd Part- As far sightedness people use converging lense for correct their focal length the following statement is false.

For part 4- It is a true statement as near sightedness means myopia and in myopia a person can see or focus on near by objects rather than the far one.

For part 5- It is a true statement as the smaller is the curvature the greater is the magnification. So the same phenomena is applicable for the telescope also.