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  1. Intensity – The Physics Hypertextbook

    For simple mechanical waves like sound, intensity is related to the density of the medium and the speed, frequency, and amplitude of the wave. This can be shown with a long, horrible, …

  2. Intensity - Summary – The Physics Hypertextbook

    Amplitude, intensity, and loudness are often used interchangeably, but the three terms have different meanings. Amplitude is a measure of the maximal change in whatever quantity is …

  3. Intensity - Problems – The Physics Hypertextbook

    Sound waves can be described by 3 related quantities. Amplitude measures to maximal change. Intensity is power per area. Loudness is the perceptual response.

  4. Special Symbols – The Physics Hypertextbook

    Reference space & time, mechanics, thermal physics, waves & optics, electricity & magnetism, modern physics, mathematics, greek alphabet, astronomy, music Style sheet These are the …

  5. Color – The Physics Hypertextbook

    Once the visual information leaves the eye, basic physics ends and neurocognition takes over. Color is determined first by frequency. Let's start by determining what a typical person would …

  6. Electric Current – The Physics Hypertextbook

    Intensity is the average power per unit area transfered by some radiant phenomenon — like the sound of a busy highway, the light from the Sun, or the spray particles emitted from a …

  7. The Nature of Light – The Physics Hypertextbook

    A graph of relative intensity vs. frequency is called a spectrum (plural: spectra). Although frequently associated with light, the term can be applied to any wave phenomena.

  8. Frequently Used Equations – The Physics Hypertextbook

    Frequently used equations in physics. Appropriate for secondary school students and higher. Mostly algebra based, some trig, some calculus, some fancy calculus.

  9. Blackbody Radiation – The Physics Hypertextbook

    Classical physics can be used to derive an equation which describes the intensity of blackbody radiation as a function of frequency for a fixed temperature — the result is known as the …

  10. The Nature of Sound – The Physics Hypertextbook

    Deal with each one in that order. amplitude, intensity, loudness, volume Amplitude goes with intensity, loudness, or volume. That's the basic idea. The details go in a separate section. [ISO …