CIE iGCSE Co-Ordinated Science P3.2.2 Refraction of light Exam Style Questions Paper 2
Question
A ray of light travels from glass into air.
In which direction is the light refracted and how does the speed of the light change?
▶️Answer/Explanation
Ans: B
Question
What is the definition of the refractive index n of a substance?
(A) \(\frac{speed\\\ of\\\ light\\\ in\\\ a\\\ vacuum}{speed\\\ of\\\ light\\\ in\\\ the\\\ substance}\)
(B) \(\frac{speed\\\ of\\\ light\\\ in\\\ the\\\ substance}{speed\\\ of\\\ light\\\ in\\\ a\\\ vacuum}\)
(C) \(\frac{frequency\\\ of\\\ light\\\ in\\\ a\\\ vacuum}{frequency\\\ of\\\ light\\\ in\\\ the\\\ substance}\)
(D) \(\frac{frequency\\\ of\\\ light\\\ in\\\ the\\\ substance }{frequency\\\ of\\\ light\\\ in\\\ a\\\ vacuum}\)
▶Answer/Explanation
Ans :A
Question
When light passes from air into glass its speed decreases but its frequency remains constant.
Light travelling in air enters a glass block at an angle of incidence that is greater than 0º.
Which row describes what happens to the direction and what happens to the wavelength of the light?
▶️Answer/Explanation
Ans: C
Question
The diagram shows a ray of light passing from air into a transparent medium.
What is the refractive index of the medium?
A 0.50 B 0.61 C 2.4 D 2.8
▶️Answer/Explanation
Ans : C