When a ray of light travelling in glass enters into water obliquely : (a) it is refracted towards the normal (b) it is not refracted at all (c) it goes along the normal (d) it is refracted away from the normal

A ray of light travelling in water falls at right angles to the boundary of a parallel-sided glass block. The ray of light : (a) is refracted towards the normal (b) is refracted away from the normal (c) does not get refracted (d) is reflected along the same path.

Light travelling from a denser medium. to a rarer medium alone a normal to the boundary : (a) is refracted towards the normal (b) is refracted away from the normal (c) goes along the boundary (d) is not refracted

When a ray of light from air enters a denser medium, it :

(a) bends away from the normal

(b) bends towards the normal

(c) goes undeviated

(d) is reflected back.