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Posted by on Thursday, February 12, 2009 at 8:47pm.

1.if frequency increases twice, how it change the energy carried by one pulse? (It may have no effect)

2. if the humidity of the air increased, what quantities will be affected: frequency, period, speed, and wavelength

  • physics - , Thursday, February 12, 2009 at 8:55pm

    1. Photon energy is proportional to frequency. If one doubles, so does the other.

    2. If you are talking about light transmission, frequency and period do not depend upon humidity. Speed and wavelength do, but only slightly

  • physics - , Thursday, February 12, 2009 at 8:57pm

    im talking about sound waves

  • physics - , Thursday, February 12, 2009 at 9:05pm

    1. Sound power depends upon pressure amplitude and speed, not frequency. What do you mean by a "pulse" of sound? If it is a short burst, energy will also depend upon how long the pulse is.

    The speed and wavelength of sound depend very weakly upon humidity. They mainly depend upon temperature and average molecular weight. Frequency and period are independent of humidity.

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