Fill ups
A ray of olight falls at the right angles on an interface of two transparent mediums. The angle of refraction is………………. .

Refractive indices of water and glass are 4//3 and 3//2 respectively.A ray of light travelling in water is incident on the water-glass interface at 30^@ .Calculate the angle of refraction.

A ray of light falls on a mirror normally.What are the values of the angle of incidence and the angle of refelection?

A ray of light falls on a right angled prism ABC (AB=BC) and travels as shown in the figure. The minimum refractive index of prism material should be .

A triangle can have two right angles.

(a) and (b) show refraction of a ray in incident at 60^@ with the normal to a glass-air interface respectively.Predict the angle of refraction in glass when the angle of incidence in water is 45^@ with the normal to a water-glass interface[Fig.6.01(c)]. .

Figures (a) and (b) show refraction of a ray in air incident at 60^@ with the normal to a glass-air and water-air interface, respectively. Predict the angle of refraction in glass when the angle of incidence in water is 45^@ with the normal to a water-glass interface [Fig. (c)]. :

Fill ups The supplement of a right angle is………………angle.

Can two right angles be supplementary?