Adiffraction grating that has 4500 lines/cm is illuminated by light that has a single wavelength. if a second order maximum is observed at an angle of 42° with respect to the central maximum, what is the wavelength of this light?

The wavelength is 742.7 nm.

Explanation:

Given that,

Grating = 4500 lines/cm

Angle = 42°

Order number =2

We need to calculate the distance

We need to calculate the wavelength

Using diffraction formula

Hence, The wavelength is 742.7 nm.

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