Question

calculate the fourth order resolution of a grating that is 8.00 cm long and is ruled at 185 lines/mm ?

Answer 1

Answer:

Light Passing through a single slit produces a pattern with

a.) Very broad central maximum

b.) much fainter secondary maxima

Light Passing through a double slit produces a pattern with

a.) broad central maximum

b.) broad secondary maxima

c.) roughly equal intensities for secondary maxima

Light Passing through a multiple sets of slits produces a pattern that follows the sequence

a.) narrow maxima

b.) more and more equal intensity for maxima farther away from center

We know that,

Resolution is the product of number of orders for the number of lines in a grating of a predefined length.

Or

Resolution, r = Number of orders \times× Length of Grating \times× Number of Lines in Grating

= 4(80\ mm)(185\ \frac {lines}{mm})4(80 mm)(185

mm

lines

)

= 5.9 \times 10^45.9×104