Breaking Glass with sound (resonance)
Finding the resonant frequency for a glass. Viewing with a strobe and high speed camera
Breaking the sound barrier
A series of planes breaking the sound barrier.
- Colour (SE)
Concorde take off and sonic boom
Compilation of Concorde taking off and a sonic boom (1.19)
Another excellent Doodle Science animation
Core Practical Length vs Frequency
A fixed load of 400g gives a fixed tension in the 22swg constantan wire. The length of the bridge is changed and the resulting frequency change measured.
Core Practical Speed of Sound (Oscilloscope)
A level Core Practical 6
Using a classroom c.r.o. (cathode ray oscilloscope) to measure the speed of sound. This is a tricky experiment and this type of oscilloscope in increasingly rare and there is a better demonstration available using a PicoScope.
The flashing trace is a problem related to the frequency of the camera and the signal.
Another excellent Doodle Science animation (1.12)
Emission Absorption spectra
An explanation of how continuous, emission and absorption spectra come about. (2.43)
Focal length How to measure it
Short animation showing how to measure the focal length of a lens
Al Gore giving a short talk about Global Warming
Hearing and how it works
Video to help understand hearing loss and hearing impairment by explaining how hearing works. (3.08)
Hearing the Sound (SE)
Vibrations 0 = 4.13
Speeds (air, sound and light) 4.13 - 7.43
Noisy objects 7.43 - 13.18
Hearing range 13.18 - 18.58
Herschel - infra red
Short video (9.58 min) starting with Herschel's discovery and then looking at infrared in more detail. The last 3 mins are basically a sales pitch but the infrared images are interesting
How to remember the electromagnetic spectrum
Very simple, short (2.08), video telling a silly story to help remember the order of the electromagnetic spectrum. I particularly like the nmemonic at the end
Laser diffraction and interference
Patterns for single and double slit interference for red yellow and green lasers. Also point interference
- Longer waves
Simple, clear animation showing a longitudinal wave
Modern Medicine - History of X-rays
Great all-round informative video:
4.40 Hand held fluoroscope
5.30 Roentgen's discovery
11.23 X-ray shoe fluoroscope
12.40 Electron accelerator (Crooke's tube)
15.53 Evolution of X-ray production
19.54 Electron gun
20.40 X-rays and the EM spectrum
Video showing the photoelectric effect. The demonstration is improved using an HT gauze. The electroscope even recharges after the discharge
Photoelectric Effect - recharge
A gold leaf electroscope being recharge by UV light !
A demonstration of the polarisation of microwaves
A simple experiment showing reflection and refraction of a laser light by a semi circular glass block
Refraction of light and water
Refraction: Light in a glass block, water. Modelling refraction and total internal reflection
Resonance experiment using mass and two springs driven by a signal generator
Resonance - breaking glass
Breaking a glass using the resonant frequency. Video enhanced using strobe lighting to show the standing waves
Ripple Tank - single and double slit diffraction
Diffraction patterns for a single and double slit shown in the water of a ripple tank
Ripple Tank - Two point interference
Ripple tank being used to show the interference of two point sources
Ritter - UV
Starting with Ritter's experiment with photographic paper, this short video (3.40) goes on to look at UV-A, UV-B and UV-C before going on to briefly descrive their use in space exploration
In 1801 Johann Ritter discovered UltraViolet Light. Physics Teacher James Lincoln explains how it was done and recreates the experiment.(0.59)
s & p waves
Very short clip showing how s and p waves move through the Earth.
- Shorter waves
Stylish animation displaying how Sonar on a ship works detecting underwater activity.
Sonar How it works
Explanation of how sonar is being used to map the sea floor in the caribbean.
Speed of sound in metal
Using Observer data logger to record the speed of a sound wave in a solid metal rod.
Quick, clear animation of a standing wave
The Electromagnetic Spectrum - Microwaves
Short video (3.23). Looking in a bit more depth at microwave radiation. Includes CMB
The Electromagnetic Spectrum - NASA
Short video (5.20). Introduction to the electromagnetic spectrum with a look at each of the wavelengths in turn.
The Electromagnetic Spectrum - Radio Waves
Short video (3.58). Looking in a bit more depth at radio waves from their first transmission at the end of the 19th Century.
FLIR Thermal Imaging for the Criminally Stupid or one use for infra red imaging
Total Internal Reflection
Another excellent Doodle Science animation (1.43)
Transverse and longitudinal wave
Very short video showing longitudinal waves and transverse waves in a slinky
Two source microwave interference
Demonstration of the interference from two microwave sources (Two source interference)
Another excellent Doodle Science animation (1.50)
Ultrasound communication bottlenose dolphin
Short nature film showing how ultrasound is useful to bottlenose dolphins
Ultrasound How it works
Nice explanation of how ultrasound works
This short video defines frequency, time period, wavelength and wave speed, and explains why wave speed = frequency multiplied by wavelength, and gives a few example calculations.
Waves Longitudinal and Transverse
A nice description of transverse and longitudinal waves