The center of curved surface of spherical mirror is called:
The more negative potential of grid, the more electrons will
be:
Which type of image is produced by the converging lens of
human eye if it views a distant object:
The distance between principal focus and pole of mirror is
called:
If a ray of light in glass is incident on an air surface at
an angle greater than the critical angle, the ray will:
Which type of image is formed by a convex lens on a screen:
