Page 237 - Physics Form 5 KSSM_Neat

Activity 7.1 ISS ICS CHAPTER 7

Aim: To gather information on the development of quantum theory Quantum Physics
Instructions:
1. Carry out a Gallery Walk activity.
KEMENTERIAN PENDIDIKAN MALAYSIA
2. Obtain information from various reading materials and websites about the findings of the
following physicists which contribute to the development of quantum theory.
Isaac Newton John Dalton Max Planck Niels Bohr

Thomas Young J. J. Thomson Albert Einstein Louis de Broglie

3. Present your findings in the form of a mind map.

Quantum Theory

Max Planck Albert Einstein Niels Bohr Louis de Broglie
(1858 – 1947) (1879 – 1955) (1885 – 1962) (1892 – 1987)
• Introduced the concept • Introduced the photon • Explained the • Introduced the
of quantum (discrete concept in 1905. production of hypothesis on the
energy) in 1900 • The photon energy is line spectrum by wave nature of
• The electromagnetic directly proportional hydrogen atoms. particles in 1924.
wave emitted by a black to the light waves • The electrons in an • Einstein and de
body is in discrete form frequency. atom orbit around Broglie postulated
known as quantum of • Einstein's quantum its nucleus on the idea of the
theory of light was
energy. successful in explaining certain shells only. wave-particle
• The energy in each the characteristics • The transition of duality of light
quantum is directly of the photoelectric electrons from a and all subatomic
proportional to the wave effect that could not be higher energy level particles.
frequency. explained by classical shell to a lower
• The intensity of the theory. energy level shell
radiation is low for the emits photons.
high frequency waves.

SCAN ME
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SCAN ME
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SCAN ME SCAN ME SCAN ME SCAN ME
Max Planck Albert Einstein Niels Bohr Louis de Broglie
https://bit.ly/3hpF02h https://bit.ly/3jlRdFV https://bit.ly/2QiRi0e https://bit.ly/3aYrtw7

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