Assuming the frequency remains constant,a monochromatic light ray is transmitted through an glass-to-air boundary,what happens to the wavelength?
A)decreases
B)approaches zero value
C)increases
D)remains unchanged

Question

Quizplus · Accepted Answer

When a monochromatic light ray passes from glass to air, its speed increases because air has a lower refractive index than glass. Since the frequency remains constant and the speed of light increases, the wavelength must increase according to the relationship $v = f\lambda$, where $v$ is the speed of light, $f$ is the frequency, and $\lambda$ is the wavelength.

Assuming the Frequency Remains Constant,a Monochromatic Light Ray Is Transmitted