# Find the largest wavelength of light falling on double slits separated by 1.20 mu m for which there is a first-order maximum. Is this in the visible part of the spectrum?

Find the largest wavelength of light falling on double slits separated by for which there is a first-order maximum. Is this in the visible part of the spectrum?
You can still ask an expert for help

• Questions are typically answered in as fast as 30 minutes

Solve your problem for the price of one coffee

• Math expert for every subject
• Pay only if we can solve it

ab8s1k28q
Given:
Slit width, d = 1.2 micrometer = $1.2×{10}^{-6}m$
order, m = 1
Formula used:
For the bright fringe, we use the formula
$d\mathrm{sin}\theta =m\lambda$
where, m is the number of order, d is the slit width, $\lambda$ is the wavelength and angle is the angular width.
For maximum value, the value of $\mathrm{sin}\theta =1$
So

This value of wavelength does not lie in the visible range. The visible range is from 400 nm to 700 nm.