A monochromatic plane wave travelling along the -direction is expressed as

PHYSICS · Subjective · AP · Physics 2: Algebra-based · Waves Sound and Physical Optics · Waves Sound and Physical Optics

Problem

A monochromatic plane wave travelling along the

+x

-direction is expressed as

E(x,t)=3\,\text{V m}^{-1}\sin\!\left(\dfrac{2\pi x}{600\,\text{nm}}-2\pi \nu t\right)

. Take

c=3\times10^{8}\,\text{m s}^{-1}

. Calculate the instantaneous value of the electric field at

x=2\,\text{m}

and

t=3.0\times10^{-9}\,\text{s}

(give the answer to two significant figures).