subject
Physics, 16.12.2019 11:31 sotelonancy888

What did the results of photoelectric-effect experiments establish?

a) electrons are emitted as soon as low-intensity, high-frequency light hits a metal surface.

b) electrons are never emitted if low-intensity light waves strike a metal surface.

c) electrons are emitted if low-intensity light has been incident on metal for a long time.

d) electrons are emitted if high-intensity light has been incident on metal for a long time.

ansver
Answers: 3

Another question on Physics

question
Physics, 22.06.2019 07:50
Imagine you are standing in the antarctic during the southern hemisphere summer. the sky is clear and blue. there are no clouds in the sky. your shadow is cast on the icy ground. what is the color of the shadow?
Answers: 1
question
Physics, 22.06.2019 17:10
Both independent and dependent clauses
Answers: 1
question
Physics, 22.06.2019 18:30
Which of the following is not a means to accelerating? question 4 options: a)increase speed b)remain still c)decrease speed d)change direction
Answers: 1
question
Physics, 22.06.2019 20:50
Asquare 1m x 1m plate is shown below. all four of its edges are kept at 0 co. at t=0the temperature distribution is given by: y xtsins n75)=.a) using separation of variables determine the temperature distribution t(x,y,t)along the plate at any time t.b) discretize the heat conduction equation +=22222 txtusing a second-order centered difference scheme for the two second derivatives and a first-order forward euler scheme for the first derivative. using von neumann stability analysis, determine the stability criterion for the proposed discretization scheme in terms of , hand t. solve for the maximum allowable time step tmax
Answers: 1
You know the right answer?
What did the results of photoelectric-effect experiments establish?

a) electrons are em...
Questions
question
Mathematics, 17.07.2019 00:30
Questions on the website: 13722363