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  2. Wave speed - Wikipedia

    en.wikipedia.org/wiki/Wave_speed

    Wave speed is a wave property, which may refer to absolute value of: phase velocity , the velocity at which a wave phase propagates at a certain frequency group velocity , the propagation velocity for the envelope of wave groups and often of wave energy, different from the phase velocity for dispersive waves

  3. Wave intensity analysis - Wikipedia

    en.wikipedia.org/wiki/Wave_intensity_analysis

    The additivity of the forward and backward wavelets coinciding at the site of measurement at a particular time can be combined algebraically with the water-hammer equations to calculate the magnitudes of the two wavelets [2] = This method assumes that the wave speed is constant. In general, the wave speed is a function of the pressure.

  4. Refraction - Wikipedia

    en.wikipedia.org/wiki/Refraction

    Refraction of light at the interface between two media of different refractive indices, with n 2 > n 1. Since the phase velocity is lower in the second medium (v 2 < v 1), the angle of refraction θ 2 is less than the angle of incidence θ 1; that is, the ray in the higher-index medium is closer to the normal.

  5. Roth IRAs: What they are, how they work and how to open one - AOL

    www.aol.com/finance/what-is-a-roth-ira-123943445...

    Then, later on, you convert the traditional IRA to a Roth IRA so you can work around the limits. “There are two ways to get money into a Roth IRA, and they both start with the letter C ...

  6. Wave equation - Wikipedia

    en.wikipedia.org/wiki/Wave_equation

    For an incident wave traveling from one medium (where the wave speed is c 1) to another medium (where the wave speed is c 2), one part of the wave will transmit into the second medium, while another part reflects back into the other direction and stays in the first medium. The amplitude of the transmitted wave and the reflected wave can be ...

  7. Electromagnetic radiation - Wikipedia

    en.wikipedia.org/wiki/Electromagnetic_radiation

    Electromagnetic radiation is commonly referred to as "light", EM, EMR, or electromagnetic waves. [2] The position of an electromagnetic wave within the electromagnetic spectrum can be characterized by either its frequency of oscillation or its wavelength. Electromagnetic waves of different frequency are called by different names since they have ...

  8. Moens–Korteweg equation - Wikipedia

    en.wikipedia.org/wiki/Moens–Korteweg_equation

    In biomechanics, the Moens–Korteweg equation models the relationship between wave speed or pulse wave velocity (PWV) and the incremental elastic modulus of the arterial wall or its distensibility. The equation was derived independently by Adriaan Isebree Moens [ 1 ] [ 2 ] and Diederik Korteweg . [ 3 ]

  9. NYT ‘Connections’ Hints and Answers Today, Wednesday, January 8

    www.aol.com/nyt-connections-hints-answers-today...

    2. Essential tools for creating music. 3. Characteristics/qualities of a large mammal. 4. These words are related to a particular genre of music (hint: they deal with "names" that are spelled a ...