The simplest case is when the object you see is also the source of the light.

Physics Narrative 5-11 11-14

The idea that light travels is not uncommon in the 21 st century. Pupils will often refer to things moving at the speed of...

Physics Narrative 5-11 11-14

The fact that we can see the Sun and stars shows that light can travel over enormous distances (150 million kilometres from...

Physics Narrative 5-11 11-14

What happens when light travels through the air and meets the surface of an object, such as a table, mirror, window, or...

Physics Narrative 5-11 11-14

Imagine the scene. You are standing at the edge of a large lake, gazing out across the water at a range of mountains which...

Physics Narrative 5-11 11-14

Imagine you're working at your desk upstairs. You become distracted by a news programme from a downstairs radio: starting to...

Physics Narrative 5-11 11-14

The way in which humans hear is rather complicated, and explaining it fully involves aspects of physiology, psychology and...

Physics Narrative 5-11 11-14

People vary in their ability to detect the pitch of a sound. For example, in tuning a guitar, some are able to distinguish...

Physics Narrative 5-11 11-14

Sounds vary not only in terms of the pitch or frequency, but also in their relative loudness.

Physics Narrative 5-11 11-14

Clap your hands not too far from a big wall and you can hear both the original clap and, shortly afterwards, its echo. What is...

Physics Narrative 5-11 11-14

Sound can travel through any medium, so long as there are sufficient particles in each cubic metre to allow the to and fro...

Physics Narrative 5-11 11-14

Sound consists of audible vibrations, which travel from a source to a detector. These can be of a whole range of frequencies...

Physics Narrative 5-11 11-14