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Analyse the given statements and choose the correct option. Statement 1 : When a ray of light passes through a prism, it bends towards the thicker part of the prism. Statement 2 : An incident ray strikes a prism, undergoes refraction, and comes out as an emergent ray.

Analyse the given statements and choose the correct option. Statement 1 : When a ray of light passes through a prism, it bends towards the thicker part of the prism. Statement 2 : An incident ray strikes a prism, undergoes refraction, and comes out as an emergent ray. Correct Answer Both statement 1 and statement 2 are CORRECT, but statement 2 is NOT THE CORRECT explanation of the statement 1.

CONCEPT:

  • When a light ray is passed from rarer medium to denser medium then it bends toward the normal and when a light ray passed from denser to a rarer medium, then it bends away from the normal.

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  • When light enters through the prism it undergoes refraction twice, as shown in the figure.

EXPLANATION:

  • When a ray of light passes through a prism, it undergoes refraction two times.
  • The first time when a ray of light passes from rarer to the denser medium of glass, it bends towards normal which is towards the base of the prism.
  • The second time the ray of light passed from denser to rarer medium, i.e., glass to air,  and it bends away from the normal, i.e., towards the base of the prism. Therefore statement 1 is correct.
  • When a light ray passes through a prism it is refracted twice at the two faces and finally emerges out as an emergent ray. Therefore statement 2 is correct but is not the correct explanation of statement 1.

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