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6 marksLight Waves

CSEC Physics · May/June 2011 · Paper 2 · Question 4(a)

Eron, a form five Physics student, has available to him a bright filament light in a ray box, an opaque screen with two closely spaced narrow slits, and a large white screen.

Describe how he can set up the apparatus to be able to observe an interference pattern of light and dark bands on the white screen and briefly explain why this pattern forms.

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Other parts of this question

  1. 4(b)(i)If the angle of refraction for the violet light, θᵣ, is 20°, what is the refractive index of this prism for violet light?[3 marks]
  2. 4(b)(ii)Calculate the speed of the violet light in the prism.[3 marks]
  3. 4(b)(iii)Calculate the frequency of violet light if the wavelength in air is 430 nm. [1 nm = 10⁻⁹ m, Velocity of light in air = 3.0 × 10⁸ m s⁻¹][3 marks]

More practice: the rest of this paper · more Light Waves questions · all CSEC Physics past papers