ICSE Class 10 Answered
Please answer to question number 18.
Asked by kandappan | 14 Jul, 2018, 04:46: PM
Expert Answer
(a) Angle of incidence with first face = 0º (angle of incidence is the angle made by the incident ray with normal)
(b) Angle of refraction from the first face = 0º
(c) Angle of incidence with second face = 60º
(d) at second face, angle of incidence 60º is greater than critical angle 42º, hence total internal reflection takes place as shown in figure.
after internal reflection, the light ray incident on bottom of the prism normally. From figure it can be seen that deviation suffered by
the light ray is 60º
Answered by Thiyagarajan K | 15 Jul, 2018, 05:38: PM
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