# Single and Multiple slit interference

*label*Physics

*timer*Asked: Jun 21st, 2018

**Question description**

answer questions:

- When white light, composed of all wavelengths (as opposed to monochromatic light that is composed of one wavelength of light), is shone through a diffraction grating, bands of various colours appear on the screen. For example, there may be first-order (m = 1) fringes for red, orange, and yellow as well as second or third order fringes for these colours.In this particular case, white light is shone on a grating that is 1.00 cm wide and contains 10 000 lines. Firstorder fringes are produced for three colours of light at angles of 30
^{o}, 35^{o}, and 40^{o}. Find the wavelengths that produce first-order maxima at these angles. Find out what colours are associated with these wavelengths.

2. validate the equations learned in this activity related to single-slit diffraction. Use the simulator to obtain measurements, and then show complete calculations of the wavelength of light using all five of the single-slit equations. (Note that you will have to calculate the angle using the sine function.) Choose any set-up you desire in terms of distance to the screen, width of the slit, and wavelength. How do your calculated wavelengths compare to the wavelength given in the simulation.