Fill in the following blanks with suitable words : (a) A convex lens ___ rays of light, whereas a concave lens___ rays of light. (b) Lenses refract light to form images : a ___lens can form both real and virtual images, but a diverging lens forms only___ images.
Fill in the following blanks with suitable words :
(a) Parallel rays of light are reflected by a concave mirror to a point called the ___.
(b) The focal length of a concave mirror is the distance from the ___ to the mirror.
(c) A concave mirror ___rays of light whereas a convex mirror___rays of light.
(d) For a convex mirror, parallel rays of light appear to diverge from a point called the___.