Question

A light beam shines through a slit and illuminates a distant screen. The central bright fringe on the screen is 1.00 cm wide, as measured between the dark fringes that border it on either side. Which of the following actions would decrease the width of the central fringe? ( There may be more than one correct answer)

a- increase the wavelength of the light
b-decrease the wavelength of the light
c-increase the width of the slit
d-put the apparatus all under water

Answer 1

Decreasing the wavelength of the light or increasing the width of the slit would decrease the width of the central fringe in a diffraction pattern.

Step-by-step explanation:

The width of the central fringe in a diffraction pattern is determined by the wavelength of the light and the width of the slit. Therefore, decreasing the wavelength of the light (option b) would decrease the width of the central fringe. Additionally, increasing the width of the slit (option c) would also decrease the width of the central fringe.

Answer 2

B, C, D.

Step-by-step explanation: