(vi)
In the white light spectrum obtained with diffraction grating, the third order image of a wavelength
coincides with the fourth order image of second wavelength. Calculate the ratio of the two
wavelength.
Answers
Answer:
The principle maxima in a grating are formed in direction given by This is the rendered form of the equation. You can not edit this directly. Right click will give you the option to save the image, and in most browsers you can drag the image onto your desktop or another program.
where (e + d ) is the grating element, ‘n’ the order of the maxima and This is the rendered form of the equation. You can not edit this directly. Right click will give you the option to save the image, and in most browsers you can drag the image onto your desktop or another program. the wavelength of the incident light.
1) For a given wavelength This is the rendered form of the equation. You can not edit this directly. Right click will give you the option to save the image, and in most browsers you can drag the image onto your desktop or another program. the angle of diffraction This is the rendered form of the equation. You can not edit this directly. Right click will give you the option to save the image, and in most browsers you can drag the image onto your desktop or another program. is different for principal maxima of different orders.
2) For white light and for a particular order n, the light of different wavelengths will be diffracted in different directions.
The longer the wavelength, greater is the angle of diffraction. So in each order, we will get the spectra having as many lines as the wavelength in the light source.
At centre (n = 0, zero order) This is the rendered form of the equation. You can not edit this directly. Right click will give you the option to save the image, and in most browsers you can drag the image onto your desktop or another program. gives the maxima of all wavelengths. So here different wavelengths coincide to form the central image of the same colour as that the light source.
Similarly the principal maxima of all wavelengths corresponding to n = 1 will form the first order spectrum, the principal maxima of all wavelengths corresponding to n = 2, will form the second order spectrum and so on.
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