21. The figure shows two point sources of light, A and B. B emits light waves that are +radians out of phase with the waves from A. A is 32 from P. B is 52 from P. (2 is the wavelength.) The phase difference between waves arriving at P from A and B is 37. a. b. P 0 rad. Trad. 2π rad. 37 rad. e. 4л rad. ANS: D 52 B 8 + 11 = 2/17 (52-32) 6+1 = 4T PTS: 1 Q = 4T -π = 3 T DIF: Easy bonde you see in a photograph of a double slit interference pattern represent

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1. The figure shows two point sources of light, A and B. B emits light waves that are

+ π

radians out of phase with the waves from A. A is

3 λ

from P. B is

5 λ

from P. (

λ

is the wavelength.) The phase difference between waves arriving at

P

from

A

and

B

is

Φ + π = \frac{2 π}{λ} (5 λ - 3 λ) \overset{ˉ}{ϕ} + π = 4 π Φ = 4 π - π = 3 π

a. 0 rad. b.

π rad

.

σ = 4 π - π = 3 π

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