Diffraction - exam practice
Diffraction
Question 1 of 4
A student is investigating the diffraction of light using a diffraction grating.
The student uses a diffraction grating with 600 lines per mm. The diffraction grating is placed 1.5 m from the screen and uses a laser with a wavelength of 500 nm.
Calculate the angle angle () for the second order maximum.
Calculate the maximum observable order using the diffraction grating in part a).
Explain with reference to path difference why the diffraction grating results in bright and dark spots of light on the screen.
A student is investigating the properties of waves using a microwave transmitter, receiver and a metal sheet with a variable width slit.
The microwaves the student uses has a frequency of 11 GHz.
Calculate the wavelength of the microwaves.
The receives does not detect and microwaves in the position shown.
Explain how the student should modify the slit to enable the receiver to detect the microwaves.
Diffraction demonstrates the wave properties of electromagnetic waves.
State one experiment which demonstrates the particle properties of light.
This question is about the diffraction of light through a single slit and double slits.
The diagram below shows the results of one of the diffraction experiments.
State whether this diffraction pattern was formed by single slit or double slit diffraction.
The pattern in the diagram was formed using red light.
Draw on the diagram to show how the intensity of blue light would vary with distance on the screen.
Describe how the central maxima would change if the distance to the screen is doubled and the slit width is halved.
A student wants to calculate the wavelength of a laser by performing the double slit experiment.
The pattern below shows the pattern observed on the screen.
Calculate the fringe spacing (w).
The distance between the double slits and the screen is 1.40 m and the slit spacing is 0.50 mm.
Calculate the wavelength of light used.
A student wishes to identify how many lines per mm an unlabelled diffraction grating has.
The student shines a laser of wavelength 500 nm through the diffraction grating and records the angles for each observable order.
Plot a graph of order number against sin().
State what the gradient of the graph represents.
Calculate the number of lines per mm for the diffraction grating used in the student's experiment.