# UV light is responsible for sun tanning. How do you find the wavelength (in nm) of an ultraviolet photon whose energy is #6.4 x 10^-19#?

The photon will have a wavelength of about

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The wavelength of a photon can be found using the formula λ = hc/E, where h is Planck's constant (6.626 x 10^-34 J*s), c is the speed of light (3.00 x 10^8 m/s), and E is the photon's energy. Entering these values yields the following result: λ = (6.626 x 10^-34 J*s * 3.00 x 10^8 m/s) / (6.4 x 10^-19 J). This gives us the wavelength in meters, which we can then convert to nanometers (1 m = 1 x 10^9 nm).

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When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.

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