Category: Physics

Select on the diagram which arrow represents the wavelength of the wave.

Select the wave with the smallest amplitude.

Select the wave with the highest frequency.

Which wave is being described here: The motion of energy is perpendicular to the direction of travel.

Which wave is being described here: The motion of energy is along the same direction as the direction of travel.

Calculate the speed of a wave with a frequency of 10 kHz and a wavelength of 2 m.

Calculate the frequency of a wave travelling at 500 ms^-1 with a wavelength of 25 m.

Calculate the speed of a wave with a time period of 1x10^-3 s and a wavelength of 250 cm.

Mark reads the back label of his microwave oven, it says frequency = 2450 MHz. Calculate the wavelength.

Soumya plays a note of wavelength 25 cm on her synthesiser. She knows the speed of sound is 340 ms^-1 in air. Calculate the frequency.

A sound wave of wavelength 0.332 m has a time period of 10^-3s. If the time period is decreased to 10^-4 s. Calculate the wavelength of the new wave.

Calculate the intensity of a wave of power 1.6 KW and falling on an area of 2.1×10⁴ m²?

Polarisation only occurs with which type of waves?

If unpolarised light waves pass through two polarised filters, and no light can be seen through them, what is the angle between the two transmission axes of the filters?

When two polarised filters have an angle of 45° between their two transmission axes, what is the intensity of the light detected compared to the unpolarised incident light?

Select the correct pair of conditions necessary for sources of waves to be coherent.

Which condition is not necessary for the production of a stationary wave?

The image above shows two wave fronts before, during and after meeting. What is this an example of?

Two coherent, in phase waves have a path difference of 3λ. What kind of interference occurs?

An experiment is set up as shown above, with two speakers connected to the same signal generator and switched on. At what points is the path difference an integer?

Two points on a wave have a phase difference of 1080°, are they in phase?

Two points on a wave have a phase difference of 7π radians, are they in phase?

On a stationary wave, where is there maximum vibration.

What is the wavelength of the fifth harmonic of a stationary wave on a string of length 4m fixed at both ends?

The wavelength of a standing wave on a string fixed at both ends is 35 cm at the sixth harmonic, what is the full length of the string?

Identify the stationary wave pattern for a string at the fourth harmonic.

A stationary wave at the first harmonic is created on a 40 cm length of string with mass 1.2 kg. The full length of the string is 65 cm and is under tension of 3 N. Calculate the frequency.

Light travels at 2.25x10⁸ ms^-1 in water, what is the refractive index of water?

Why is cladding is required in fibre optics?

The refractive index of glass is 1.52, what speed does light travel through it?

This diagram shows a ray of light travelling through a semi-circular glass block. Which letter would represent the critical angle if TIR occurred?

Light passes from air through a glass container and into olive oil. Select the diagram that best shows this. Refractive indexes are as follows: glass = 1.52 and oil = 1.47

This image shows a cross section of fibre optic cable. Select why the ray enters the cladding.

The speed of light in the core of a fibre optic cable is 2.04x10⁸ ms^-1. Calculate the refractive index.

Calculate the critical angle for the boundary when light leaves a medium of refractive index 1.52 and enters air.

Light travelling through air is incident on glass at an angle of 23°. The refractive index of the glass is 1.52. Calculate the angle of refraction.

In a fibre optic cable the core has a refractive index of 1.52 and it's cladding is 1.34. Calculate the critical angle at the boundary between the core and cladding of the cable.

Which lens causes light to diverge?

Which type(s) of images do concave lenses form?

Which type(s) of images do convex lenses form?

Which diagram represents a concave lens?

What is the name of distance between the lens and the principal focus?

An object is 30 mm from a convex lens with focal length 8 cm. Is the image virtual or real?

An small child's toy is 4 cm from a lens with focal length of 6 cm. How far away from the lens is the image formed?

An image of a perfectly circular object of radius 25.8 cm is projected onto a screen. The object is also perfectly circular and has an area of 16.3 cm. Calculate the magnification on the lens.

Select the correct statement.

A focal point for a concave lens is 150 mm away from the lens. An object is then placed 7.5 cm from the lens. Calculate the distance the image is from the lens.

A lens has a focal length of 4.8 cm. Calculate the lens' power.

An inverted image is seen 3 times its original size when the object is placed 140 mm front of a convex lens. Calculate the focal length of the lens.

Diffraction is an example of light behaving as a __________.

The greatest amount of diffraction occurs when _________.

A diffraction grating has 350 slits per metre, what the slit spacing, d?

Monochromatic light of wavelength λ diffracts through a grating of d. What happens to the value of θ if the wavelength was changed to 2λ?

Reducing the width of a single slit that has monochromatic light passing through affects the central maximum, how?

Calculate the wavelength of a monochromatic light incident on a diffraction grating of 2.67x10⁶ lines per metre with an angle of 17° to the first order maxima.

A blue laser of wavelength 480 nm is incident on a diffraction grating of 3.00x10⁶ lines per metre, how many order maxima (excluding 0 order) can be seen?

Where is the brightest maxima located?

Light of wavelength 7.12x10^-7 m is incident on a diffraction grating with a line spacing of 1.89x10^-6 m. Calculate the angle from the normal to the 2nd order maximum.

Remember Young's slits from GCSE? He's back! Incident monochromatic light of 0.43 μm is shone on a double slit of separation of 0.26 mm. If the screen is 42 cm away from the grating, calculate the fringe width.

What is the technique used in ultrasound scanning?

BBC Radio Sheffield West Midlands broadcasts on 97.4 MHz. Calculate the wavelength of the radio waves.

Which one of the following types of wave can't be polarised?

Complete the sentence: "When waves pass from one medium to another, if the mediums have similar densities then most of the energy is ____________."

Fishermen use sonar to detect the depth of fish beneath the boat. On this occasion, the echo returned after 0.83 s. The speed of sonar waves through water is 1500 m s^-1. Calculate the depth of the fish.

Why is gel added to a patient's skin when using ultrasound?

Select the missing word: "For ultrasounds, ________ wavelengths produce clearer images".

What happens when a ultrasound wavelength meets an interface in the body?

Which sentence is true of ultrasound transducers?

Select the missing phrase: "For an object to be resolved in the body, the ultrasound wavelength must be ________ the object."

Select the definition of the electron volt.

In the context of electrons in atoms, what is excitation?

Electrons are accelerated through a potential difference of 230 V. Calculate their velocity.

What is meant by the threshold frequency for a metal?

What is the effect on the emission of electrons the frequency of the incident light was increased?

The work functions of four metals are shown above. These metals are irradiated by incident light of 5.2x10¹⁴ Hz, which metals will emit electrons?

If the intensity of incident light was increased on a surface where electrons were already being emitted what would the effect be?

For the first electron to be liberated from a helium atom 24.6 eV of energy is required. Calculate the frequency of light needed.

The work function of an unknown metal is 1.2 eV. Light with energy 3 eV is incident on its surface, calculate the wavelength of the light.

The wavelength of the electrons can be measured by diffraction. An electron gun accelerates electrons into a beam, these were diffracted and upon diffraction the wavelength was found to be 1.23×10^-9m. Calculate the potential difference used to accelerate the electrons from rest into a beam.

Hot gases produce ___________.

Select the correct description of an absorption line spectrum.

The Photoelectric Effect is an example of light as a __________.

The Young’s double slit experiment is an example of light as a __________.

The equation E = hf is an example of light as a __________.

Photons are an example of light as a __________.

Electrons can show can show wave light properties.

Which phenomenon is not an example of light as a wave?

Which is the correct chronological of discoveries from these scientists?

The electromagnetic spectrum is an example a ____________.

Which phenomenon of light can be explained by light acting as a particle or wave?

The h in E = hf represents:

A spring extends by 12 cm when a mass of 87 g is attached to it. Calculate the spring constant. g = 9.81 ms^-2

If the deformation of the material is plastic, the material __________.

Under a 4 N force, two identical springs, in parallel, stretch 130 mm. Calculate the spring constant for one of the springs.

Estimate k from the graph shown above.

A meteor traveling through space has a k = 4.2x10⁶ Nm^-1 and a force of 5x10⁸ N. Calculate the extension of the meteor.

Two nichrome wires, A and B, have a load of 30 N placed on them each. The original lengths of the wires are 3 m and 2 m. Each wire shows the same extension. Find the ratio of A_k to B_k.

At which point on the graph shown above is the elastic limit?

What is another term for tensile deformation?

This graph shows the extension of 4 different springs, which spring is the stiffest?

What is the relationship between the force applied, F, and the extension, x of a material that obeys Hooke's Law?

Two springs attached in series extend by 5 cm when a load of F is applied to them. They have different constants of 76 Nm^-1 and 31 Nm^-1 respectively. Calculate the value of F.

When plotting a force extension graph for the loading and unloading of a material, when would the unloading line not pass through the origin?

A wire has a diameter of 0.5 mm and a breaking stress of the wire is 7.4x10¹⁰ Nm^-2. Calculate the mass that would break the wire. g = 9.81 ms^-2

A wire of 1.2 m extends a 3 mm when a load of 20 N is applied to it. Calculate it's strain.

A stress-strain graph is shown above for an unknown material. Where on the curve would you mark the UTS point?

The graph above shows a fishing wire being extended by adding masses. Use the graph to estimate the elastic strain energy of the material.

A copper wire has a length of 25 cm and a force of 400 N is applied to the wire, which causes it to stretch to 28.9 cm. Calculate the elastic strain energy stored in the wire.

A wire has a diameter of d and a when a force of F is applied, it breaks at σ. What would the value of σ be if the diameter was halved?

A new material is developed and the research team want to know the amount of elastic strain energy it can store. They test the material multiple times and plot a graph with the averages. Estimate from the graph the elastic strain energy that is stored in the wire up to the limit of proportionality.