Question

A pane of glass is spray painted so as to be opaque; then, a razor is used to create one slash 0.50mm wide through the paint. Calculate the width of the middle bright spot if a laser light of wavelength 650nm passes through the slash on to a wall 2.0m from the slash. A. 2.0mm B.2.3mm C.2.6mm D.5.3mm E. 8.8mm

Answer 1

width of the middle bright spot = 2.6 mm

Step-by-step explanation:

given data

wide d = 0.50 mm = 0.50 ×
`10^(-3)` m

wavelength = 650 nm = 650 ×
`10^(-9)` m

wall D = 2 m

to find out

width of the middle bright spot

solution

we know width formula that is

width of the middle bright spot = wavelength ×D / d

put here all these value we get

width of the middle bright spot = wavelength ×D / d

width of the middle bright spot = 650 ×
`10^(-9)` × 2 / 0.50 ×
`10^(-3)`

width of the middle bright spot = 2.6 ×
`10^(-3)` m

so width of the middle bright spot = 2.6 mm