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Reflection
Reed instruments, such as clarinets and oboes, have reeds set in pipes. The pipe length controls the pitch of the instrument and improves the tone of the notes. Different notes are produced by changing the length of the pipe
by opening or closing valves or finger holes.
Reflection
When a beam of light strikes a surface, it may go through the surface, or it may be bounced off.
Smooth surface
Photograph taken without using the reflector
If the light is bounced, it is said to be reflected.
If the light is coloured, the effect of reflection will be to change
the colour of the light because some colours will usually be absorbed more than others. Gold, for example, appears orange- yellow simply because it reflects more orange–yellow light than any other kind of light. Copper appears orange–brown because it reflects more of these colours than any other colour.
 Reflection – When light bounces off a surface, it is reflected. If the surface is completely smooth, the light rays rebound in parallel, and the result is a mirror. Most surfaces are not as smooth as a mirror, and light bounces from them irregularly. That is why they have a more matte appearance. Nevertheless, they all reflect light.
 Reflection – Because light travels in straight lines, illuminating a subject for a portrait shot using just one light source will leave one part of the subject in shadow. That can be compensated for by using a very reflective surface to bounce some light back to the side in shadow. The same principle can be used to brighten dark walls in a room.
Most metals reflect a large part of the light that falls on them, which
is why they appear shiny (called metallic lustre). Mirrors are made of either silver or aluminium coated onto glass. The glass is only there to protect the metal.
In transparent materials the direction in which light strikes the surface is also very important in determining whether or not light will be reflected. We all know that we can see through glass if we look through it more or less
Rough surface
Subject
Photographic reflector to bounce some light from the flash onto subject
Flash
Camera
Photograph taken using the reflector
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