| Study the following figure in which a student has marked the angle of incidence \[(\angle i),\] angle of refraction \[(\angle r),\] angle of emergence \[(\angle e),\] angle of prism \[(\angle A)\] and the angle of deviation \[(\angle D)\]. The correctly marked angles are: |
 |
| (a) \[\angle A\] and \[\angle i\] |
| (b) \[\angle A,\,\angle i\] and \[\angle r\] |
| (c) \[\angle A,\,\angle i,\,\angle e\] and \[\angle D\] |
| (d) \[\angle A,\,\angle i,\,\angle r\] and \[\angle D\] |
Answer:
(a) \[\angle A\] and \[\angle i\]
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