3.2 Refraction, Diffraction And Interference

Question 1

Define coherence

Answer 1

Waves that have a fixed phase difference and same frequency and wavelength

Question 2

Why is a laser useful in showing interference and diffraction

Answer 2

Produces monochromatic light so diffraction and interference patterns are more defined

Question 3

What’s Young’s double slit experiment

Answer 3

Single light source is directed towards 2 slits the light interferes constructively and destructively to create an interference pattern

Question 4

Describe interference pattern created using white light

Answer 4

Bright white central max. flanked by alternating spectral fringes of decreasing intensity with violet closest to the 0 order and red furthest