Aspectrometer with grating size of 2 cm and a total of 10,000 lines is used to analyze the spectrum of a star. the light is normally incident on the grating and illuminates the whole grating. a sharp spectral line is observed in second order at an angle of 45o from normal incidence. what is the wavelength of this starlight?

The wavelength of this starlight is 707 nm.

Explanation:

Given that,

Distance = 2 cm

Total lines = 10000

Angle = 45°

We need to calculate the distance

We need to calculate the wavelength of this starlight

Using formula of distance

Put the value into the formula

Hence, The wavelength of this starlight is 707 nm.

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b. solenoid

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