College Physics (7th Edition)

Published by Pearson
ISBN 10: 0-32160-183-1
ISBN 13: 978-0-32160-183-4

Chapter 22 - Reflection and Refraction of Light - Learning Path Questions and Exercises - Multiple Choice Questions - Page 772: 7


both (a) and (c)

Work Step by Step

When light travels from denser to lighter medium $(n_{1}>n_{2})$, for a certain angle of incidence called the critical angle , the angle of refraction is $90^{\circ}$ , and the refracted ray is directed along the boundary between the media. If the angle of incidence is greater than the critical angle $\theta_{1}>\theta_{c}$ , the light isn’t refracted at all, but is internally reflected. So, both (a) and (c) are true.
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