| A student very cautiously traces the path of a ray through a glass slab for different values of the angle of incidence \[(\angle i)\]. He then measures the corresponding values of the angle of refraction \[(\angle r)\] and the angle of emergence \[(\angle e)\] for every value of the angle of incidence. On analysing these measurements of angles, his conclusion would be: |
| (a) \[\angle i>\angle r>\angle e\] |
| (b) \[\angle i=\angle e>\angle r\] |
| (c) \[\angle i<\angle r<\angle e\] |
| (d) \[\angle i=\angle e<\angle r\] |
Answer:
(b) \[\angle i=\angle e>\angle r\]
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