Bright Tutorials Bright Tutorials
ICSE Class 10 Physics Question 4 of 25

Solved 2025 Question Paper ICSE Class 10 Physics — Question 19

Back to all questions
19
Question

Question 3(i)

A ray of light enters a rectangular glass slab submerged in water at an angle of incidence 55°. Does this ray undergo total internal reflection when it moves from water to glass? Justify your answer. (The critical angle for glass–water interface is 54°)

Answer

This ray will not undergo total internal reflection because for total internal reflection, the light ray should travel from denser to rarer medium but in the given situation light ray travels from rarer to denser medium since refractive index of glass is more than that of water. So, there will be no total internal reflection.