A ray of light after refraction becomes perpendicular to the normal. What is this angle of incidence called?

True

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False

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True angle

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Parallel angle

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Solution

The correct option is B
False

Critical angle is the angle, if at which the line is incident, then the refracted ray becomes perpendicular to the normal, i.e. angle of refraction is equal to $90^{\circ}$ . At an incident angle greater than the critical angle, total internal reflection takes place.

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A ray of light after refraction becomes perpendicular to the normal. What is this angle of incidence called?

The correct option is B False Critical angle is the angle, if at which the line is incident, then the refracted ray becomes perpendicular to the normal, i.e. angle of refraction is equal to 90∘. At an incident angle greater than the critical angle, total internal reflection takes place.

The correct option is B
False

Critical angle is the angle, if at which the line is incident, then the refracted ray becomes perpendicular to the normal, i.e. angle of refraction is equal to $90^{\circ}$ . At an incident angle greater than the critical angle, total internal reflection takes place.