A double-slit arrangement uses slits of width separated by

PHYSICS · Single correct · A Level · Physics · Waves · Waves

Problem

A double-slit arrangement uses slits of width

a = 0.15\,\text{mm}

separated by

d = 0.45\,\text{mm}

. For light of wavelength

\lambda

, which is the lowest interference order

m

that will be missing from the pattern because it coincides with a single-slit minimum? (a)

m=4

(b)

m=3

(c)

m=2

(d)

m=6