subject
Physics, 02.10.2019 04:00 mcky65

Abeam of light hits a sheet of metal. if it has enough energy, electrons break free from the metal sheet.

which choice correctly describes the behavior of light in this situation?

1. in this situation, light behaves as a particle colliding with another object. this is because increasing the energy in the light beam releases more electrons from the metal, but does not increase the energy carried by each electron.

2. in this situation, light behaves as a particle colliding with another object. this is because increasing the energy in the light beam increases the energy carried by each electron but does not increase the number of electrons released.

3.in this case, light acts like a wave because it requires the total energy of a wave to dislodge the electron. increasing the energy in the light beam releases more electrons and increases the energy carried by each electron.

4.in this case, light acts like a wave because it requires the total energy of a wave to dislodge the electron. increasing the energy in the light beam doesn’t releases any more electrons but it does increase the energy carried by each electron.

ansver
Answers: 3

Another question on Physics

question
Physics, 21.06.2019 20:00
Afixed electric space heater wired by a cable with an ampacity of 30 a should draw a maximum current of a. 30 a. b. 24 a. c. 15 a. d. 27 a.
Answers: 2
question
Physics, 22.06.2019 11:20
The ultracentrifuge is an important tool for separating and analyzing proteins. because of the enormous centripetal accelerations, the centrifuge must be carefully balanced, with each sample matched by a sample of identical mass on the opposite side. any difference in the masses of opposing samples creates a net force on the shaft of the rotor, potentially leading to a catastrophic failure of the apparatus. suppose a scientist makes a slight error in sample preparation and one sample has a mass 10 mg larger than the opposing sample. if the samples are 12 cm from the axis of the rotor and the ultracentrifuge spins at 70,000 rpm, what is the magnitude of the net force on the rotor due to the unbalanced samples? ( be thorough on your answer)
Answers: 3
question
Physics, 22.06.2019 12:30
An ice-making machine inside a refrigerator operates in a carnot cycle. it takes heat from liquid water at 0.0 degrees celsius and rejects heat to a room at a temperature of 19.2 degrees celsius. suppose that liquid water with a mass of 76.3kg at 0.0 degrees celsius is converted to ice at the same temperature. take the heat of fusion for water to be l_f = 3.34*10^5 j/kg.how much energy e must be supplied to the device? express your answer in joules.
Answers: 1
question
Physics, 22.06.2019 14:10
The number of passengers who arrive at the platform of a subway station for the 10 am train is a random variable with a mean of 120 and a variance of 16. find the lower bound of the probability that there will be between 100 and 140 passengers (round off to second decimal place).
Answers: 3
You know the right answer?
Abeam of light hits a sheet of metal. if it has enough energy, electrons break free from the metal s...
Questions
question
Chemistry, 31.03.2020 11:50
question
Mathematics, 31.03.2020 11:51
question
History, 31.03.2020 11:54
question
Mathematics, 31.03.2020 11:55
question
Physics, 31.03.2020 12:00