Microwave A has frequency and travels in air

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

Problem

Microwave A has frequency

9.0\times10^{9}\,\text{Hz}

and travels in air. Microwave B is produced by changing the source so that its frequency becomes

1.5

times that of A while still propagating in air. (a) Calculate the ratio of their wavelengths

\lambda_B/\lambda_A

. (b) Keeping the frequency of B fixed, it is now sent through a glass slab of refractive index

1.50

. Determine its new wavelength in the glass expressed as a fraction of

\lambda_A

. (c) Using your answers, comment on whether the product

\lambda\nu

for an electromagnetic wave depends on the medium.