Assessment: Interference and Diffraction of Light

According to Huygens' principle, how is a new wavefront constructed from an old one?

Light of wavelength 450 nm passes through slits 0.4 mm apart, forming a pattern on a screen 1 m away. Find the fringe spacing, in mm.

Light of wavelength 550 nm passes through a single slit 0.25 mm wide. Find the angle of the first minimum, in degrees.

A grating has 500 lines per millimetre. Find the first-order (m=1) diffraction angle for light of wavelength 600 nm.

In a double-slit setup, the fringe spacing is measured as 3 mm, with L=2.5 m and d=0.4 mm. Find the wavelength used, in nm.

A grating diffracts light of wavelength 500 nm at 14.5° for m=1. Find the grating's line density, in lines per mm.

Why can a person hear music playing in another room even when the door is only slightly ajar, without seeing the source?

Why do larger telescope apertures (openings) produce sharper images of distant stars?

In a double-slit experiment, the 4th bright fringe (m=4) appears 10 mm from the center on a screen 2 m away, with slits 0.5 mm apart. Find the wavelength used, in nm. (Use y=mλL/d.)

A grating produces its second-order (m=2) maximum for red light (λ=700 nm) at the same angle as some other wavelength's third-order (m=3) maximum. Find that other wavelength, in nm.