Question

A red laser (lambda = 609 nm) is incident on a diffraction grating that has n = 2300 lines per cm. Randomized Variables A = 609 nm n = 2300 lines/cm What is the angle, in radians, that the first order maximum makes, theta_1? What is the angle of the fourth order maximum, theta_4, in radians? theta_4 =

Answer 1

The slit separation is 4.347826x10 m 2300 linesicm 230000 lines/m The angle for first order (m- 1) mazimum is calculated as follows d sin (1)(609×10-9 m 4.347826 x10-6 m ー -sin = 0.1405 rad -0.14 rad angle for fourth order (m-4)maximum is calculated as foll d sin e-mA (4)(609× 104 m) 4.347826 x10° m -1 0.59472 rad 0.5947 rad