Light Waves: Audio Guided Solution

Waves, Sound and Light: Light Waves

Determine the wavelength of the infrared carrier wave transmitted by a television remote control at 38 kHz.

7900 m (rounded from 7889 m)

Read the problem carefully and develop a mental picture of the physical situation. If necessary, sketch a simple diagram of the physical situation to help you visualize it.
Identify the known and unknown quantities and record in an organized manner, often times they can be recorded on the diagram itself. Equate given values to the symbols used to represent the corresponding quantity (e.g., v = 3.00x10⁸ m/s, λ = 554 nm, f = ???).
Use physics formulas and conceptual reasoning to plot a strategy for solving for the unknown quantity.
Identify the appropriate formula(s) to use.
Perform substitutions and algebraic manipulations in order to solve for the unknown quantity.

Get more information on the topic of Light Waves at The Physics Classroom Tutorial.

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