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15. if a light of ray incidents normally on one of the faces of prism of refractive index 2 and emergent ray just gazes the second face of prism then the angle of deviation is? |
| Answer» 15. if a light of ray incidents normally on one of the faces of prism of refractive index 2 and emergent ray just gazes the second face of prism then the angle of deviation is? | |