Question

A ray of light passes from a medium A to another medium B. no refrection of light occurs if the ray of light the boundary of medium B at an angle of
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Answer 1

Answer:

THE CORRECT ANSWER= ANGLE  IS GREATER THAN 90 DEGREE

Step-by-step explanation:

Eventually the refracted ray will make an angle of 90° with the surface normal. If the angle of incidence is increased beyond that angle, then refraction does not occur! All of the light incident on the interface is reflected back into the incident medium!

If the angle of incidence is zero then it means the light Ray is travelling perpendicular to the medium hence there would be no refraction and the angle of refraction would also be zero. ... The ray enters the other medium at right angles to the surface and continues in the same direction with a change in speed.

T he maximum possible angle of refraction is 90-degrees.If you think about it (a practice that always helps), you recognize that if the angle of refraction were greater than 90 degrees, then the refracted ray would lie on the incident side of the medium - that's just not possible.

Answer 2

No refraction of light occurs if the ray of light at the boundary of medium B is at an angle greater than the critical angle for the two given media.

• The critical angle for two given media is the angle of incidence in the denser medium for which the angle of refraction in the rarer medium is 90 degrees.
• When a ray of light travelling from a denser medium to a rarer medium is incident at the interface of two media at an angle greater than the critical angle for the two media, the ray is 'totally' reflected back into the denser medium.
• Since the ray is totally reflected back, no refraction takes place.