Fill In The Blanks.

Question 11 Mark

Large ______ mirrors are used to concentrate sunlight to produce heat in solar furnaces.

Answer

Large concave mirrors are used to concentrate sunlight to produce heat in solar furnaces.

View full question & answer→

Question 21 Mark

The radius of curvature of a concave mirror whose focal length is 5cm is ______

Answer

The radius of curvature of a concave mirror whose focal length is 5cm is 10 cm

View full question & answer→

Question 31 Mark

The angle of deviation of light ray in a prism depends on the angle of ______.

Answer

The angle of deviation of light ray in a prism depends on the angle of prism and angle of incident.

View full question & answer→

Question 41 Mark

The mirror used in search light is ______.

Answer

The mirror used in search light is concave mirror

View full question & answer→

Question 51 Mark

In going from a rarer to denser medium, the ray of light bends ______.

Answer

In going from a rarer to denser medium, the ray of light bends towards normal

View full question & answer→

Question 61 Mark

Light is refracted or bent while going from one medium to another because of its ………………… changes.

Answer

speed

View full question & answer→

Question 71 Mark

A negative sign in the value of magnification indicates that the image is …………………

Answer

real

View full question & answer→

Question 81 Mark

All distances parallel to the principal axis are measured from the ………………… of the mirror.

Answer

pole

View full question & answer→

Question 91 Mark

A spherical mirror whose reflecting surface is curved outwards is called ………………… mirror.

Answer

convex

View full question & answer→

Question 101 Mark

The ratio of the sine of the angle of incidence to the sine of …………………is constant.

Answer

angle of refraction

View full question & answer→

Science Fill In The Blanks.

Test yourself on this topic