The diameter of spherical mirror is called:
Curvature
Aperture
Sphere
Both a and b
If a ray of light in glass is incident on an air surface at an angle greater than the critical angle, the ray will:
Refract only
Reflect only
Partially refract and partially reflect
Diffract only
The mirror whose outer surface is reflecting is called:
Concave mirror
Convex mirror
Mirror
Lens
The speed of sound in a liquid is …………..than that in gases:
Ten times
Fifteen times
Five times
Two times