Curated Video
Submarine Communication
We have sent messages around the world and into space, but communicating underwater remains a challenge. How and why do radio waves allow us to talk to submarines? Physics - Waves - Learning Points. Salt water absorbs sound waves making...
Curated Video
Colour
The world appears to be a colourful place, but what are colours? What properties of light determine what colour we see? Physics - Waves - Learning Points. Colour is how our brains perceive different wavelengths of light. Newton...
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How Do Lasers Work?
Concentrated light can be incredibly powerful and useful. Learn how laser beams are produced by controlling how atoms emit photons of light. Physics - Waves - Learning Points. Lasers are photons of the same frequency going in the same...
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Waves in Medicine
The properties of high frequency electromagnetic radiation are incredibly important in the world of medicine, allowing physicians to look inside the human body and even combat cancer. Physics - Waves - Learning Points. X-rays and gamma...
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The Electromagnetic Spectrum
The range of electromagnetic radiation in the electromagnetic spectrum is huge. Where does this radiation come from and how do the frequencies and wavelengths vary? Physics - Waves - Learning Points. Electromagnetic radiation is all...
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What Makes Up the Electromagnetic Spectrum?
From radio waves to gamma rays, the electromagnetic spectrum is useful in different ways. How does this radiation differ and how can they be used? Physics - Waves - Learning Points. Electromagnetic radiation exists along a continuous...
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Doppler Shift: Sound Discovery
How a unique but simple experiment in the 19th century gave a new insight into the behaviour of sound waves. Physics - Waves - Learning Points. The Doppler Effect is when the pitch of a sound seems to change as it moves past. The...
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Measuring Music
We use a sounding board called a sonometer to investigate how the pitch of sound changes when the length of wire being plucked changes. We change the position of a moveable bridge to change the length of the wire and discover that...
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Splitting Light
We use a prism to split white light into its constituent colours. Light is passed through a slit in a screen before it hits the prism. The prism refracts the light and we can see the different colours. A second slit can be used to see...
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Diffraction
The bending or spreading of waves when they encounter an obstacle. A Twig Science Glossary Film. Key scientific terms defined in just 60 seconds using stunning images and concise textual definitions. Twig Science Glossary Films reinforce...
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Radio waves
The lowest frequency range of electromagnetic radiation, with wavelengths from millimetres to many kilometres. A Twig Science Glossary Film. Key scientific terms defined in just 60 seconds using stunning images and concise textual...
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Fluorescent
A fluorescent substance is one that absorbs light at one wavelength and re-emits the energy as light at another wavelength, usually longer, a phenomenon called fluorescence. A Twig Science Glossary Film. Key scientific terms defined in...
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Why is the Sky Blue? - Atmospheric Colors
Find out why the sky is blue. Physical processes -Light - White light Learning Points The Sun emits white light. White light can be split into the spectrum of colours by a prism. Different colours have different wavelengths. A Twig...
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Optical Activity: When Light Meets Molecules
Optical activity refers to the ability of chiral compounds to rotate the plane of polarized light. Compounds that rotate light clockwise are termed dextrorotatory (+), while those that rotate it counterclockwise are levorotatory (−). The...
Curated Video
Wave Nature of Light: What is Light?
By the end of this learning object, the student will be able to: Recognize the spectrum colors.86731
Curated Video
Wave Motion: Periodic Motion
By the end of this learning object, the learner should be able to: Classify waves according to their ability to propagate and transfer energy in space.9871
Curated Video
Types of Wave
By the end of this learning object, the student will be able to: Summarize the types of wave motion and its law.28774
Wonderscape
Exploring Characteristics of Sound Waves
Discover the characteristics of sound waves, including wavelength, frequency, and pitch. Learn about the Doppler effect and its impact on sound perception. Explore how acoustics influence building design and sound control. Sound part 3
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Pitch and Volume
Dr. Forrester explains the qualities of sound, pitch and volume, and how sound is created through vibrations.
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Can You Hear Me Now?
Dr. Forrester explains how sound behaves through different mediums.
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I WONDER - What Is Wave length?
This video is answering the question of what is wave length.
Curated Video
GCSE Physics - Intro to Waves - Longitudinal and Transverse Waves #61
This video covers: - What waves are - How to label a wave. E.g. amplitude, wavelength, crest, trough and time period - How to calculate wave speed - The difference between transverse and longitudinal waves General info: - Suitable for...
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GCSE Physics - How Radiation Affects Temperature #72
This video covers: - The idea that objects can absorb and emit energy in the form of radiation, and that this can affect their temperature - What determines which type of radiation is emitted - Wavelength-intensity graphs - How these...