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Questions and Answers
Questions and Answers
What is the characteristic of ordinary source of light in terms of intensity and divergence?
What is the characteristic of ordinary source of light in terms of intensity and divergence?
- Low intensity and high divergence (correct)
- Low intensity and low divergence
- High intensity and low divergence
- High intensity and high divergence
Which type of light waves have the same wavelength and same phase difference?
Which type of light waves have the same wavelength and same phase difference?
- Polychromatic light
- Incoherent light
- Spherical wavefront
- Monochromatic light (correct)
Which postulate of Bohr describes the emission of a photon?
Which postulate of Bohr describes the emission of a photon?
- Spherical wavefront - Light spread in all directions (High divergence), less intensity
- Coherent light: Two or more light waves have the same wavelength and same phase difference
- Emission: The electron makes the transition to a lower state and emits a photon whose energy is equal to the energy difference of two states (correct)
- Absorption: When an electron absorbs a photon it goes to a higher state
What type of wavefront does an ordinary source of light emit?
What type of wavefront does an ordinary source of light emit?
What is the nature of radiation from an ordinary source of light?
What is the nature of radiation from an ordinary source of light?
Monochromatic light consists of two or more light waves with the same wavelength and different phase difference.
Monochromatic light consists of two or more light waves with the same wavelength and different phase difference.
Coherent light consists of two or more light waves with the same wavelength and same phase difference.
Coherent light consists of two or more light waves with the same wavelength and same phase difference.
Spherical wavefront indicates light spreading in all directions with low intensity.
Spherical wavefront indicates light spreading in all directions with low intensity.
Plane wavefront indicates light emitting in only one direction with high divergence.
Plane wavefront indicates light emitting in only one direction with high divergence.
An electron emits a photon with energy equal to the energy difference of two states during absorption.
An electron emits a photon with energy equal to the energy difference of two states during absorption.
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Study Notes
Study Notes
Characteristics of Ordinary Light Sources
- Emit light with varying intensity and high divergence.
- Produce spherical wavefronts that spread in all directions.
Types of Light Waves
- Monochromatic Light: Composed of multiple waves with the same wavelength but different phase differences.
- Coherent Light: Involves multiple waves that share the same wavelength and maintain the same phase difference.
Wavefronts
- Spherical Wavefront: Emanates light uniformly in all directions, typically associated with lower intensity.
- Plane Wavefront: Represents light traveling in a single direction with a higher intensity and greater divergence.
Photon Emission in Bohr's Model
- Bohr's postulate indicates that an electron emits a photon when transitioning between two energy states, with the photon’s energy equivalent to the energy difference between those states.
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