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Class 10
Solutions to CBSE Sample Paper - Science Class 10

If a beam of red light and a beam of violet light are incident at the same angle on the inclined surface of a prism from air medium and produce angles of refraction r and v respectively, which of the following is correct?

(A) r = v

(B) r > v

(C) r = 1/v

(D) r < v


Answer - 



The red light bends the least while the violet the most.

Angle of Refraction of Red and Violet Light - Teachoo.jpg

We can see from the figure that

  • Red bends the least , so it’s angle of refraction is lowest (i.e. r is lowest )
  • Violet bends the most , so it’s angle of refraction is highest (i.e. v is highest )

So, the correct answer is (d)


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CA Maninder Singh is a Chartered Accountant for the past 12 years and a teacher from the past 16 years. He teaches Science, Accounts and English at Teachoo