Draw a ray diagram to illustrate the iamge formation by a Newtonian type of reflecting telescope.

Draw a diagram to illustrate spherical aberration in a convex lens.

Draw a labelled ray diagram to show the image formation in a refracting type astronomical telescope .Why should the diameter of teh objetive of a telescope large?

Draw a ray diagram to show the image formation by a concave mirror, when the object is kept between its focus and the pole.

Draw a ray diagram to show the image formation by a simple microscope. What is the nature of the image formed?

Draw a rough diagrams to illustrate the following: Open Curve Closed Curve.

The image of a candle is formed by a convex lens on a screen. The lower half of the lens is painted black to make it completely opaque. Draw the ray diargram to show the image formation. How will this image be different from the one obtained when the lens is not painted black?