A-LevelPhysicsSuperposition9702/12 · May/June 2014 · Q261 Mark
Light passes through a diffraction grating ruled at 1000 lines per cm and the same wavelength of light also passes through two narrow slits 0.5 mm apart. Both situations produce intensity maxima and minima on a screen. Which statement about the separation of the maxima on the screen and the sharpness of the maxima is correct?
AThe diffraction grating maxima are less widely spaced and are less sharp than the two-slit maxima.
BThe diffraction grating maxima are less widely spaced and are sharper than the two-slit maxima.
CThe diffraction grating maxima are more widely spaced and are less sharp than the two-slit maxima.
DThe diffraction grating maxima are more widely spaced and are sharper than the two-slit maxima.
✓ Correct answer
D: The diffraction grating maxima are more widely spaced and are sharper than the two-slit maxima.
Practise more questions on this topic
Oracle Prep sorts past-paper questions by topic, so you can drill Superposition and see which topics are most likely to come up next.
Sign up free →