When white light strikes the surface of a soap film (index of refraction ) from air…

PHYSICS · Subjective · A Level · Physics · Waves · Waves

Problem

When white light strikes the surface of a soap film (index of refraction

n=1.33

) from air at normal incidence, does the ray reflected from the top surface undergo a half-wavelength (

180^{\circ}

) phase shift? Answer "yes" or "no."