The speed of light is maximum in

(a)

vacuum

(b)

glass

(c)

diamond

(d)

graphite

Which of the following statements about total internal reflection is true?

(a)

angle of incidence should be greater than critical angle

(b)

light must travel from a medium of higher refractive index to a medium of lower refractive index

(c)

both (a) and (b)

Mirrors having spherical surface of reflection are __________________

(a)

plane mirror

(b)

lenses

(c)

spherical mirrors

(d)

prism

The mirror that diverge the light rays is______________________

(a)

concave

(b)

convex

(c)

plane

(d)

None of these

The centre of the reflecting surface of a spherical mirror is _____________________

(a)

centre of curvafure

(b)

focus

(c)

pole

(d)

radius of curvature

The radius of curvature of the spherical mirror is equal to __________.

(a)

focal length

(b)

twice the focal length

(c)

thrice the focal length

(d)

half of the focal length

To form a real image -________________mirror is required.

(a)

parallel

(b)

plane

(c)

convex

(d)

concave

According of _______________________ of light, angle of incidence is equal to angle of reflection

(a)

refraction

(b)

dispersion

(c)

reflection

(d)

total internal reflection

The mirror used by a dental surgeon is _______________________

(a)

plane

(b)

convex

(c)

concave and convex

(d)

concave

The second law of refraction is stated by ____________________

(a)

C.V. Raman

(b)

Gallileo

(c)

Newton

(d)

Snell