What is the volume of sound? Sounds are vibrations that travel through the air. A weak vibration doesn't travel very far. Discover more about volume. All about light Learn how light travels and ...

An animated sequence that illustrates a range of different light sources. The Sun, fire, electric lights and torches are all shown. Darkness is presented as the absence of light and shadows as ...

Right now, our top pick for the best wake up light is the Lumie Bodyclock Shine 300, thanks to its customisation options, design and sound features. Read on for our top picks for the best wake up ...

Light and Sound show at Delhi: The Red Fort in Delhi was the first place in Asia to start the sound and light show. The show at Red Fort is entertaining as it reenacts Delhi’s 5000 year history ...