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The mercury atoms in a fluorescent tube are excited and then emit photons in the ultraviolet region of the elecrtomagnetic spectrum. Explain how the mercury atoms become excited.

The mercury atom is excited one of its electrons goes from an upper electron shell to a lower electron shell thanks to some energy that it recives from the outside. When an atom is excited it is instable ...

Answered by Marie B. • Physics tutor

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In the Photoelectric effect, Why does increasing the light intensity have no effect on the energy of the electron emitted?

The equation to calculate the energy of an emitted electron is: E = hf - φ, where E is the energy of the electron emitted, h is the Planck's constant,

Answered by Pankaj K. • Physics tutor

21216 Views

why is gravitational potential negative?

the gravitational potential is set to be 0 at a distance of infinity.

Answered by Navdeep S. • Physics tutor

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Explain what is meant by the term "plastic deformation".

Plastic deformation happens to a material when that material is stretched beyond its elastic limit and hence won't return to its original shape. Therefore the material is permenantly mis-shaped.

Answered by Elizabeth H. • Physics tutor

10152 Views

What is the Rutherford scattering experiment and what did it tell us about the nature of the atom?

The experiment involves firing alpha particles, positively charged helium nuclei made of two protons and two neutrons, at a thin layer of gold foil. There is a screen behind the gold foil which is used as...

Answered by Tutor61277 D. • Physics tutor

34746 Views