During a brown-out, the electric power company drops the voltage ofthe power lin

Question

During a brown-out, the electric power company drops the voltage ofthe power line and the incandescent light bulbs in your housebecome dimmer. When this happens, the filaments in the bulbsoperate at a lower than normal temperature, so

A)their color is somewhat bluer thannormal.
B)they emit ultraviolet light.
C)their color is the same as normal, but theyare less bright.
D)their color is somewhat redder thannormal. Hint: The Wien Law gives the wavelength of the peakof the radiation distribution, max =3´106/T. Here is measured inunits of nanometer = 10-9 m and T is in Kelvin. So as the temperature decreases the wavelengthincreases. In the visible region, red light has the longestwavelength and violet light has the shortest wavelength.

A)their color is somewhat bluer thannormal.
B)they emit ultraviolet light.
C)their color is the same as normal, but theyare less bright.
D)their color is somewhat redder thannormal. Hint: The Wien Law gives the wavelength of the peakof the radiation distribution, max =3´106/T. Here is measured inunits of nanometer = 10-9 m and T is in Kelvin. So as the temperature decreases the wavelengthincreases. In the visible region, red light has the longestwavelength and violet light has the shortest wavelength. Hint: The Wien Law gives the wavelength of the peakof the radiation distribution, max =3´106/T. Here is measured inunits of nanometer = 10-9 m and T is in Kelvin. So as the temperature decreases the wavelengthincreases. In the visible region, red light has the longestwavelength and violet light has the shortest wavelength.

Explanation / Answer

As stated, when the temp drops, the wavelength increases; Red light has the longest wavelength So (D) there color is somewhat redder than normal. It will also beless bright :) This is fact!

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