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Questions and Answers
What does LASER stand for?
What does LASER stand for?
- Light Absorption by Spontaneous Emission of Radiation
- Luminous Amplification by Stimulated Emission of Radiation
- Light Amplification by Stimulated Emission of Radiation (correct)
- Luminous Absorption by Spontaneous Emission of Radiation
Who provided the mathematical expression for stimulated emission in 1917?
Who provided the mathematical expression for stimulated emission in 1917?
- Maiman
- Einstein (correct)
- Planck
- Feynman
What is the mathematical expression for Planck's law?
What is the mathematical expression for Planck's law?
- $E = -4(x + 3)^2 + 2$
- $E = mc^2$
- $E = E_2 - E_1 = h\nu$ (correct)
- $E = \frac{hc}{\lambda}$
What did Theodore Maiman create in 1960?
What did Theodore Maiman create in 1960?
What is the expression for energy density of black body radiation at any frequency and temperature?
What is the expression for energy density of black body radiation at any frequency and temperature?
What is the acronym LASER stands for?
What is the acronym LASER stands for?
What did Theodore Maiman create in 1960?
What did Theodore Maiman create in 1960?
What is the mathematical expression for energy density of black body radiation at any frequency and temperature?
What is the mathematical expression for energy density of black body radiation at any frequency and temperature?
What is the energy output when an electron falls from one energy level to another according to Planck's law?
What is the energy output when an electron falls from one energy level to another according to Planck's law?
What is the role of input energy in raising an electron from one energy level to another?
What is the role of input energy in raising an electron from one energy level to another?
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Study Notes
Laser Technology and Planck's Law
- LASER stands for Light Amplification by Stimulated Emission of Radiation.
- In 1917, Albert Einstein provided the mathematical expression for stimulated emission.
- The mathematical expression for Planck's law is: Bv(T) = (hv^3) / (c^2) * 1 / (e^(hv/kT) - 1).
- Theodore Maiman created the first working laser in 1960.
- The energy density of black body radiation at any frequency and temperature is given by: u(v,T) = (8Ï€hv^3) / (c^3) * 1 / (e^(hv/kT) - 1).
- When an electron falls from one energy level to another, the energy output is given by: ΔE = hf, where hf is the energy of the emitted photon.
- Input energy raises an electron from one energy level to another, allowing it to transition to a higher energy state.
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