Light and the Electromagnetic Spectrum. Light as a Wave light is a visible form of energy most of the energy that surrounds us is invisible this energy.

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Presentation transcript:

Light and the Electromagnetic Spectrum

Light as a Wave light is a visible form of energy most of the energy that surrounds us is invisible this energy travels in waves made of electric and magnetic fields called Electromagnetic Radiation

Light as a Wave Electromagnetic Spectrum = the entire range of visible and invisible energy waves

Properties of Waves wavelength amplitude

Wavelengths of the Electro-Magnetic Spectrum

Wavelength and Colour

Seeing Colour

Pinhole Camera

How Light is Transmitted

Transparent: allows light to pass through Translucent: allows some light to pass through Opaque: allows no light to pass through

Light Reflection The reason we see objects is because they reflect light

Smooth Surface

Rough Surface

Reflection in a Plane Mirror

Activity 4.11 How Light Reflects

A B

Law of Reflection: When light reflects off a surface, the angle of incidence is always equal to the angle of reflection i = r

Looking in a mirror

Object distance vs. Image Distance