Aassignment2

1. According to the de Broglie hypothesis, which of the following exhibits wave-particle duality?

• Only light

• Only electrons

• Both light and electrons

• Neither light nor electrons

1. Which principle states that it is impossible to precisely determine both the position and momentum of a particle simultaneously?

• Newton's Laws

• Heisenberg's Uncertainty Principle

• Planck's Quantum Theory

• Einstein's Theory of Relativity

1. The Compton effect refers to the scattering of:

• Light by a glass prism

• Electrons by a magnetic field

• X-rays by a material

• Photons by charged particles

1. What is the principle behind the lasing action in a laser?

• Stimulated emission

• Spontaneous emission

• Absorption of photons

• Reflection of light

1. Which of the following conditions is necessary for population inversion to occur in a laser medium?

• Absorption of photons

• Thermal equilibrium

• Higher energy levels being more populated than lower energy levels

• No energy input

1. In fibre optics, which type of optical fibre is known for its ability to transmit light over long distances with minimal loss?

• single mode fibre

• multi-mode fibre

• Plastic optical fibre

• Step-index fibre

1. Explain the concept of wave-particle duality in the context of quantum theory.

Describe the photoelectric effect.

1. According to the de Broglie hypothesis, the wavelength (λ) associated with a particle is inversely proportional to its __________.

1. Define Heisenberg's Uncertainty Principle for Energy and time.