Answer:
The scientific method
Make an observation.
Ask a question.
Form a hypothesis, or testable explanation.
Make a prediction based on the hypothesis.
Test the prediction.
Iterate: use the results to make new hypotheses or predictions.
Explanation:
Answer:
At some point on say, the receiving screen, light emanating from the left side of the slit will be out of phase (a difference of 1/2 wavelengths) from light coming from the center of the slit.
Thus for every point that is left of the center of the slit, there will be a point on the right side of the slit that is out of phase,
There will be no light on the screen at that particular point and thus there will be a dark fringe there.
That is the basic explanation for the appearance of dark and bright fringes on the receiving screen.
Answer:
486,750 kg*m/s
Explanation:
Momentum is mass*velocity
M = m*v
M = 8850kg*55m/s
M = 486,750 kg*m/s
Answer: absorbed by the object
Explanation: When a light wave with a single frequency strikes an object, a number of things could happen. The light wave could be absorbed by the object, in which case its energy is converted to heat. The light wave could be reflected by the object. And the light wave could be transmitted by the object
Answer:
Explanation:
In the photoelectric effect, the energy of the incident photon is used partially to extract the photoelectron from the metal (work function) and part is given to the photoelectron as kinetic energy:
(1)
where
hf is the energy of the photon, with h being the Planck constant and f the photon frequency
is the work function of the metal
K is the kinetic energy of the electron
In this problem, the photon hasa wavelength of , so its frequency is
Now we can use eq.(1) to find the Kinetic energy of the photoelectron
And the kinetic energy of the electron is given by:
From which we can find the electron's velocity: