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

Quantum Physics ,Hertz and Planck ppt

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Quantum Physics ,Hertz and Planck ppt