This section includes ideas from both Y7 and Y8 on all three topics. Make sure you pick the correct section that you are studying…
Light Y7/8 Key Terms
Term
Definition
Reflection
When light bounces off surfaces. (On a mirror the angle it shines on the mirror and the angle it reflects are the same.)
Refraction
When light bends when it goes into a different material e.g. glass, water, air.
Dispersion
When white light separates into colours of the spectrum.
Spectrum
All the different colours. R, O, Y, G, B, I, V Three primary: green, red, blue. Secondary: green + red = yellow OR green + blue = cyan OR red + blue = magenta
Mirror
A shiny surface which reflects light.
TriangularPrism
This makes light refract inside the prims and disperse in the air into a spectrum of colours
Virtual Image
Not real – i.e your face that appears inside a mirror behind the wall
Vacuum
Light does not need a medium to travel through
Transparent
Light can pass through a transparent sheet of glass
Opaque
Light cannot travel through a wall
Ray diagram
A model which uses ruled lines to show the pathway of travel, with arrows, connected up
Incident
Light going towards a surface
Reflected
Light going away from a surface (normally as the same angle it came it at)
Normal
Line at 90 degrees to a surface where you measure the angle from
Scattering
A rough surface scatters light in all directions so no image is formed
Filters
Act to filter out all the colours except that one.
Translucent
Allows some light to pass through but not enough to see detailed shapes
University of Vienna Simulation (PC version) to look at lenses for the more advanced view) lenses simulation
Reflection and Refraction
This movie shows refraction, reflection, TIR with prisms.
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Reflection and Refraction
This movie shows refraction, reflection, TIR with prisms.
This movie shows refraction, reflection, TIR with prisms.
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Refraction and Reflection of Laser Light
This is a simple video to show the principle of the refraction of light and [...]
This is a simple video to show the principle of the refraction of light and also the reflection of light using laser monochromatic light. You can clearly see that the ...light changes direction inside the prism or slows down. This is the idea of "refraction". It turns in towards the normal then away as it exits. The pathway is a constant refraction as the density is even throughout. This is not always the case for example in water the pressure changes cause curved refraction, as it the same effect with seismic waves travelling through the Earth. Interesting as well to see something which students often miss as the reflected ray on the surface of the block or the TIR or totally internally reflected rays from the internal surface of the prism.
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Amazing Refraction Magic Trick - The Appearing Beaker
Works on refraction and refractive index being matched.
Works on refraction and refractive index being matched.
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Laser Refraction of Light
This demo shows how you refract light by passing into a denser medium i.e. [...]
This demo shows how you refract light by passing into a denser medium i.e. water. The light slows down so as c is lower than the speed of light the ...wavelength changes (reduces) and it interacts with the medium differently.
Refraction = slowing or speeding up of waves in another medium.
Change of angle can happen when the light enters at an angle which is not at 90 degrees to the normal.
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Dispersion of Laser light
Amazing fun, with lasers
Amazing fun, with lasers
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Circumzenithal Arc
The circumzenithal arc, CZA, is the most beautiful of all the halos an [...]
The circumzenithal arc, CZA, is the most beautiful of all the halos an ethereal spectrum
The CZA is never a complete circle around the zenith, that is the exceptionally rare. ...The light that forms the CZA enters an ice crystal through its flat top face, and exits through a side prism face. The refraction of almost parallel sunlight through what is essentially a 90-degree prism accounts for the wide colour separation and the purity of colour.
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Converging and Diverging Lens
This sets shows the behaviour of light as it passes through: 1) a convex [...]
This sets shows the behaviour of light as it passes through:
1) a convex lens 2) a concave lens 3) a rectangular glass block 4) a prism
Recommended for O' Level Science Physics and Pure ...Physics
This simple video (not in amazing focus!) gives you a simple method to see [...]
This simple video (not in amazing focus!) gives you a simple method to see how a lens can focus light from a filament on a screen. The best thing is ...to try this in class and you can see the filament turns with the naked eye. My camera phone does not do this well but you can see the method works and the Maths!
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Resolving Images Apple retina display?
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IR Imaging for Breast Exams
Fox Network talking about breast exams and how thermal imaging can save lives
Fox Network talking about breast exams and how thermal imaging can save lives
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Infrared Radiation
This is a video taken at the NEC in Birmingham at the Grand Designs Live [...]
This is a video taken at the NEC in Birmingham at the Grand Designs Live show. You can clearly see the difference in IR radation emitted by my body when ...I rub my hands and create extra thermal energy.
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Infra Red Light.wmv
A video to show how an remote control emits infra red radiation that you [...]
A video to show how an remote control emits infra red radiation that you cannot see. However, a camera will pick up the signal
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Radar at Birmingham Airport
An airport surveillance radar (ASR) is a radar system used at airports to [...]
An airport surveillance radar (ASR) is a radar system used at airports to detect and display the presence and position of aircraft in the terminal area, the airspace around airports. ...It is the main air traffic control system for the airspace around airports.
At large airports it typically controls traffic within a radius of 60 miles (96 km) of the airport below an elevation of 25,000 feet. The sophisticated systems at large airports consist of two different radar systems, the primary and secondary surveillance radar.
The primary radar typically consists of a large rotating parabolic antenna dish that sweeps a vertical fan-shaped beam of microwaves around the airspace surrounding the airport. It detects the position and range of aircraft by microwaves reflected back to the antenna from the aircraft's surface.
The secondary surveillance radar consists of a second rotating antenna, often mounted on the primary antenna, which interrogates the transponders of aircraft, which transmits a radio signal back containing the aircraft's identification, barometric altitude, and an emergency status code, which is displayed on the radar screen next to the return from the primary radar.
It operates at a frequency of 1.03 - 1.09 GHz in the L band with peak power of 160 - 1500 W.
The positions of the aircraft are displayed on a screen; at large airports on multiple screens in an operations room at the airport monitored by air traffic controllers who direct the traffic by communicating with the aircraft pilots by radio. They are responsible for maintaining a safe and orderly flow of traffic and adequate aircraft separation to prevent midair collisions.
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Episode 30 Radiation Spectrum
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Discovery of the electrmagnetic spectrum by Frederick William Herschel
I borrowed this video purely for educational purposes, for my online [...]
I borrowed this video purely for educational purposes, for my online Physical Science students. The original video can be seen at http:--www.youtube.com-watch?feature=player_embedded&v=gSyxCggesgA
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Laser Eye Surgery | The Patient Experience
Contact us to find out more http://www.londonvisionclinic.com/contact-us/ [...]
Contact us to find out more http://www.londonvisionclinic.com/contact-us/ Professor Dan Reinstein talks about how the laser used in laser eye surgery interacts safely with the cornea's outer layer of tissue, ...while patient Alex Cookson mentions some of the advantages of laser eye surgery in comparison to wearing glasses or contact lenses.
This first video shows how an oscilloscope works. It clearly shows how the amplitude or height from middle (zero disturbance) of a wave is the loudness. The frequency of a wave is the length show for a whole cycle (or circle/ up & down).
Signal Generator and Oscilloscope
Oscilloscope and Signal Generator showing ideas of frequency and amplitude for Ks3-5 Pupils
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Signal Generator and Oscilloscope
Oscilloscope and Signal Generator showing ideas of frequency and amplitude [...]
Oscilloscope and Signal Generator showing ideas of frequency and amplitude for Ks3-5 Pupils
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Soundwaves on an oscilloscope
Simple demo of a human voice and whistling on an LCD oscilloscope to show [...]
Simple demo of a human voice and whistling on an LCD oscilloscope to show how pure notes and complex waves are formed.
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Chaladni Plate Standing Waves
This is a simple video to show how vibrations from a signal generator make [...]
This is a simple video to show how vibrations from a signal generator make a plate oscillate or move up and down. However, there are places there there is a ...large amplitude and places where the amplitude is zero. This is called a "standing wave" like you would see on a string. This causes the semolina grains to either move a lot or not at all, at the nodus (knot) which you cannot see on the plate!
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Standing Waves Demo Chladni Plate
Great idea to show a standing wave for AS Physics. This one uses an AC [...]
Great idea to show a standing wave for AS Physics. This one uses an AC signal and transformer with magnet.
Permanent link to this article: https://www.animatedscience.co.uk/ks3-light-and-sound
