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 1.0cm^2 patch of skin, 3.7 mJ of ultraviolet light at a wavelength of 254nm will produce reddening; at 300nm wavelength, 13mJ are required. Part A What is the photon energy corresponding to each of these wavelengths? E_254, E_300 = ?J
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Physics, 22.06.2019 07:00, girlysimbelieve
The seven sisters, seven stars located more than 400 light-years away in the taurus constellation can be seen here with venus and another constellation, orion. the seven stars stay grouped together but seem to move, like the planet venus. why do stars seem to move like planets in the night sky?
Answers: 3
Physics, 22.06.2019 18:30, ayahabdulhaqq2
An electron in an x-ray machine is accelerated through a potential difference of 1.00 × 104 v before it hits the target. what is the kinetic energy of the electron in electron volts?
Answers: 2
Physics, 23.06.2019 01:00, dbanks701
Nthe 19th century, women were expected to conform to a certain role that entailed a. gaining domestic skills and establishing a career b. going to college and getting married c. getting married and having children d. graduating from college and being a housewife
Answers: 1
Exposure to a sufficient quantity of ultraviolet will redden the skin, producing erythema - a sunbur...