# Algebra Assignment

Please check my work on this part of the assignment.

Medical x-rays, with a wavelength of about 10^-10m, can penetrate completely through your skin.

a. ultraviolet rays, which cause sun burn by penetrating only the top level of skin, have a wavelength about 1000 times the wavelength of an X-ray. Find the wavelength of ultraviolet rays.

b. the wavelengths of visible light are between 3.8x10^-7 m and 7.6x10^-7m. Are these wavelength longer or shorter than those of ultraviolet rays?

My work: 1000 * 10^-10 comes to 1 * 10^-7 when written in scientific notation. The decimal point is moved 3 places to the left.

Since 1 is less than 3.8 and 7.6 with the exponents being the same, wavelengths of ultraviolet rays are shorter than wavelengths of visible light.

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1. correct on all counts

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posted by Steve

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