Physics: WAVE PHENOMENA (AHL) Topical Past Paper Questions

(a) Light of wavelength $ 6.0 \times 10^{-7} $ m is incident on two parallel slits. The graph shows the variation with diffraction angle $ \theta $ of the intensity I of light observed on a screen far from the slits. $ I_{0} $ is the intensity of light on the screen due to one sl…

A siren emits sound of wavelength $\lambda$ and speed $c$ when at rest. The siren now moves towards a stationary observer at speed $v$. What is the wavelength and the speed of the sound received by the observer when $v$ is much less than $c$?

A beam of coherent monochromatic light is incident normally on a single rectangular slit. The diffraction pattern is observed on a screen. O is the point on the screen directly opposite the slit. P and Q are the first minima on either side of the central fringe of the diffraction…