CourseCourseConceptConceptDocumentDocument

CAIE A-Level Physics AS 8.3.2 Experiments That Demonstrate Two Source Interference Questions

Describe experiments that demonstrate two-source interference using coherent sources.

Syllabus
2028–2030
Course
Physics 9702
Level
AS

Exam points

  • Describe experiments that demonstrate two-source interference using coherent sources.

CAIE A-Level Physics AS 8.3.2 Experiments That Demonstrate Two Source Interference Questions question 1

[Maximum number: 1]

The diagram shows a view from above of a double-slit interference demonstration.
L is a monochromatic light source with a vertical filament. B is a barrier with two narrow vertical slits and S is a screen upon which interference fringes form.

Figure for Question CAIE A-Level Physics AS 8.3.2 Experiments That Demonstrate Two Source Interference Questions question 1 — CAIE A-Level Physics AS

The intensity is I at the point on the screen where the centre of the fringe pattern forms.
When one of the slits is covered, what is the intensity at the same point on the screen?

A

I2\frac{I}{\sqrt{2}}

B

I2\frac{I}{2}

C

I22\frac{I}{2 \sqrt{2}}

D

I4\frac{I}{4}

All question bank results loaded