Quantum Physics ,Hertz and Planck ppt

QUANTUM PHYSICS An overview of some key ideas from Maxwell, Hertz and Planck.

Introduction ,[object Object],[object Object],[object Object],[object Object],[object Object]

Electromagnetic radiation ,[object Object],[object Object],[object Object],[object Object],[object Object]

Electromagnetic waves These waves self-propagate, and can travel through empty space.

The Hertz Experiments: 1886-1888 ,[object Object]

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Polarisation by reflection ,[object Object]

Measuring the speed of Hertz’s radio waves ,[object Object],[object Object],[object Object]

An extra discovery….. ,[object Object],[object Object],[object Object],[object Object]

Black body radiation ,[object Object],[object Object],[object Object]

Black body curves At a given temperature, there will be peak wavelength emitted by the black body. These curves were obtained by experimental measurements.

The Ultraviolet catastrophe ,[object Object]

The clash between experiment and prediction

Max Planck -1900 ,[object Object],[object Object]

Energy is quantised Planck initially thought he had just invented a mathematical trick to explain away the annoying radiation curve. He did not really believe that electromagnetic radiation occurred in discrete lumps or quanta

Quantum Physics ,Hertz and Planck ppt

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