The diffraction grating

Question 1

What is a diffraction grating made of

Answer 1

piece of optical equipment made from glass.

Question 2

Why is a diffraction grating better than using 2 slits only.

Answer 2

it has more than 2 slits.

So improves brightness and sharpness of the maxima and makes it easier to get accurate wavelength

The maxima are also further apart, so angle can be measured with lower uncertainty.

Question 3

what is the equation for diffraction gratings and letter represents

Answer 3

ssinθ =nλ

s means slit spacing
n means order of the maximum eg. n1,n2,n3 from origin

Question 4

DEFINE ‘ORDER’ IN DIFFRACTION GRATING

Answer 4

The number of the pattern, n, on either side of the central maximum

Question 5

formula for getting the max order of maxima

Answer 5

S/lamda