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WorksheetsAQA PiXL A-Level Physics - Waves & Quantum
Total questions: 18
Worksheet time: 33mins
2 points on a progressive wave are 1/3 of a wavelength apart. The distance between the two points is 2cm. If the speed of the wave is 10 ms-1 what is the frequency of the wave?
5Hz
20Hz
167Hz
1500Hz
Which of the following waves cannot be polarized?
Visible light
Radio waves
Ultrasonic
Gamma
A guitar string of length 80cm vibrates with a third harmonic frequency of 305Hz. What is the wavelength of the wave?
244cm
53.3cm
16.2cm
3.80cm
What is the approximate phase difference between the waves shown?
2π
3 π/2
π
π/2
When comparing X rays with visible light, which statement is correct?
X-rays travel faster in a vacuum
X rays have a higher frequency
Only X rays can be polarised
X rays do not show diffraction effects
Which set of conditions would cause the interference maxima produced by a double slit experiment at a distance of 1.5m from the sources to be closest together?
Yellow light 580nm from the sources 2mm apart
Water waves of wavelength 20mm from sources 1m apart
Ultrasonic wave of wavelength 1.5cm from sources 40mm apart
Violet light of wavelength 380nm from sources 6mm apart
Which of the following describes the type of wave produced on a stretched guitar string after it has been plucked?
Stationary, longitudinal, electromagnetic
Stationary, transverse, mechanical
Progressive, longitudinal, electromagnetic
Progressive, transverse, mechanical
What are the conditions for total internal reflection of light to occur
The light is travelling from a less optically dense medium to a more optically dense medium at an angle equal to the critical angle
The light is travelling between media of equal optical densities at an angle greater the critical angle
The light is travelling between media of equal optical densities at an angle equal to the critical angle
The light is travelling from a more optically dense medium to a less optically dense medium at an angle greater than the critical angle
The density of a nylon guitar string of diameter 1.0 x 10-3m is 1.15 x 103 kgm-1. What is the mass per unit length, µ of the nylon string?
1.15 kg m-1
1.15 x 106 kg m-1
3.6 x 10-3 kg m-1
9.0 x 10-4 kg m-1
Two light wave sources with the same frequency and with a constant phase difference are said to be ….
Polarised
Diffracted
Coherent
Longitudinal
A 6cm diffraction grating has 20 000 slits. What is the separation of the slits?
3 x 10 µm
0.33 mm
3 nm
33 km
The speed of light in a material is 1.7 x 108ms-1. What is the refractive index of the material?
0.57
1.43
1.76
2.31
In the photoelectric effect which of the following increase when the intensity of the light incident on the metal plate is increased?
The frequency of the photons
The maximum kinetic energy of the photoelectrons
The number of photons emitted per second
The threshold frequency
The power of a light bulb is 60W and the wavelength of the light emitted by the bulb is 520nm. What is the number of photons emitted by the bulb each second?
3.82 x 1019
1.57 x 1020
1.15 x 108
1.74 x 1021
What is the energy in electron volts of a photon of ultra violet light of frequency 7.9 x 1014Hz?
3.27eV
1.48 eV
37.9 x 104 eV
8.38 x 10-38eV
What is the frequency of the photons emitted when an electron falls to the ground state (-10.4eV) from the -5.4eV excited state?
7.55 x 1033Hz
3.8 x 1015Hz
1.21 x 1015Hz
8.2 x 1014 Hz
The energy levels of a Hydrogen atom are drawn below. What type of light will be emitted following the transition of an electron from E3 to E1?
X-ray
Ultra violet
Visible
Microwave
What is the de Broglie wavelength of a person of mass 60kg moving at a speed of 2ms-1?
7.95 x 10-32m
5.52 x 10-36m
3.68 x 10-44m
1.58 x 1042m
