3. Electromagnetism and Optics

Wave Optics — Quiz

Test your understanding of wave optics with 5 practice questions.

Practice Questions

Question 1

In a Young's double-slit experiment, if the distance between the slits is $d$, the distance to the screen is $L$, and the wavelength of light is $\lambda$, what is the condition for the $m$-th order dark fringe (destructive interference) on the screen?

Question 2

A diffraction grating has $N$ lines per unit length. If light of wavelength $\lambda$ is incident normally on the grating, what is the angular position $\theta$ of the $m$-th order principal maximum?

Question 3

In the context of thin film interference, if a thin film has a refractive index $n_f$ and is surrounded by media with refractive indices $n_1$ and $n_2$, what is the phase change upon reflection at an interface where light goes from a lower refractive index medium to a higher refractive index medium?

Question 4

Which of the following photonic devices utilizes the principle of interference to precisely filter specific wavelengths of light?

Question 5

In a Young's double-slit experiment, if the entire apparatus is immersed in a liquid with a refractive index $n > 1$, what happens to the spacing between the interference fringes on the screen?