State any one advantage of using a reflecting telescope in place of a refracting telescope.
Important Questions on Optical Instruments
In which, microscope or telescope, is the difference in focal lengths of the objective and the eye-piece smaller?
Using a ray-diagram, show the image formation by a simple microscope (magnifying glass). What is the nature of the image?
What is the difference between linear magnification and angular magnification (also called magnifying power) produced by a lens?
Why is, in a microscope, objective lens of a small aperture is taken?
Draw ray-diagram to illustrate formation of image in a compound microscope.
Express the magnifying power (angular magnification) of an astronomical telescope in terms of the focal lengths of the objective and the eye-piece.
In a telescope the focal length of the objective is large while that of the eye-piece is small. Explain its reason, giving the necessary formula.
