Aparallel beam of light from a laser with a wavelength 450 nm, falls on a grating whose slits are 1.28 x 10^-4 cm apart. how far (in cm) is the 1t order bright spot from the center of the pattern on a screen 3.4 m away?

Y_1 = 1.195 m = 119.5 cm

Explanation:

For nth order bright fringe, the distance from the center of the pattern is given by :-

Where,

n = order of nth  bright fringe. = 1

wavelength of  given light  =  

D = distance between the screen and slits. =  3.4 m

and d = separation between the slits.

Y_1 = 1.195 m = 119.5 cm

find the sum of the two horizontal vectors and the sum of the two vertical vectors

isoceles right angled triangle