Part A Exposure to a sufficient quantity of ultraviolet will redden the skin, producing erythema - a sunburn. The amount of exposure necessary to produce this reddening depends on the wavelength. For a 1.0 cm² patch of skin, 3.7 m.J of ultraviolet light at a wavelength of 254 nm will produce reddening; at 300 nm wavelength, 13 mJ are required. What is the photon energy corresponding to each of these wavelengths? Express your answers using three significant figures separated by a comma. ? Ο ΑΣΦ E254, E300 = Submit Request Answer Part B J How many total photons does each of these exposures correspond to? Express your answers using two significant figures separated by a comma. VAΣ ΜΕ ΑΣΦ N254, N300 Submit Request Answer ? photons

Principles of Physics: A Calculus-Based Text
5th Edition
ISBN:9781133104261
Author:Raymond A. Serway, John W. Jewett
Publisher:Raymond A. Serway, John W. Jewett
Chapter28: Quantum Physics
Section: Chapter Questions
Problem 1P
Question
Part A
Exposure to a sufficient quantity of ultraviolet will
redden the skin, producing erythema - a sunburn. The
amount of exposure necessary to produce this
reddening depends on the wavelength. For a 1.0 cm²
patch of skin, 3.7 m.J of ultraviolet light at a
wavelength of 254 nm will produce reddening; at 300
nm wavelength, 13 mJ are required.
What is the photon energy corresponding to each of these wavelengths?
Express your answers using three significant figures separated by a comma.
?
Ο ΑΣΦ
E254, E300 =
Submit
Request Answer
Part B
J
How many total photons does each of these exposures correspond to?
Express your answers using two significant figures separated by a comma.
VAΣ
ΜΕ ΑΣΦ
N254, N300
Submit
Request Answer
?
photons
Transcribed Image Text:Part A Exposure to a sufficient quantity of ultraviolet will redden the skin, producing erythema - a sunburn. The amount of exposure necessary to produce this reddening depends on the wavelength. For a 1.0 cm² patch of skin, 3.7 m.J of ultraviolet light at a wavelength of 254 nm will produce reddening; at 300 nm wavelength, 13 mJ are required. What is the photon energy corresponding to each of these wavelengths? Express your answers using three significant figures separated by a comma. ? Ο ΑΣΦ E254, E300 = Submit Request Answer Part B J How many total photons does each of these exposures correspond to? Express your answers using two significant figures separated by a comma. VAΣ ΜΕ ΑΣΦ N254, N300 Submit Request Answer ? photons
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