In two separate experiments, red (720 nm) and purple (410 nm) light is diffracted through the same single slit onto a very tall screen

In two separate experiments, red (720 nm) and purple (410 nm) light is diffracted through the same single slit onto a very tall screen. Which of the following statements is correct?

		There will be an equal number of red and purple fringes visible on the screen.
		There will be more red fringes visible on the screen.
		There will be more purple fringes visible on the screen.

Solutions

Expert Solution

as d * sin(theta) = m * wavelength

for maximum order

m = d/wavelength

hence, the maximum order will be more for smaller wavelength

and more fringes will be observed for purple screen

the correct option is
There will be more purple fringes visible on the screen.

genius_generous answered 1 year ago

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