For a light to be coherent light waves should have:
same color
different phases
same wavelength and phase
all wavelengths
Which phenomenon shows the wave nature of light?
reflection
refraction
diffraction
lenses
Bright fringes are a result of:
diffraction
constructive interference
destructive interference
stimulated...
1/
a/ How fast should a sound source move away from you if the
frequency you perceive is equal to half the actual frequency?
b/ The speed of sound in the air is 350 m / s. What would you
hear if this sound source approached you?
4) A ray of white light is incident on a prism surface
at some angle, so that you see a rainbow coming out from the other
side. Order the colors with respect to their individual degrees of
refraction, that is, by their refraction angles. (order them from 1
to 4)
-
1. 2. 3. 4. Yellow
-
1. 2. 3. 4. Red
-
1. 2. 3. 4. Blue
-
1. 2. 3. 4. Green
5) Rainbows are the results...
You should have 10 entries. There should be a minimum of 4
behavioral entries and 4 emotional entries, and the remaining 2
entries can be either type.
As you learn more concepts and theories, begin to fill in the
third column, justifying your explanation for the behavior or
emotion with a psychological theory. You must use a theory to
justify your explanation for 8 of the 10 entries, 4 behavioral
entries and 4 emotional entries.
Date
Activity or Emotion
Motivation...
1.
The surface of a lake will always reflect light. It is less
common for a lake to reflect a clear image of buildings and lights
on the other side of the lake; this happens most often on still
mornings or evenings.
a) What is the name for the type of reflection that the lake
usually exhibits?
b) What is the name for the type of reflection that the lake
exhibitswhen it forms clear images?
c) What is the cause...
An entrepreneur has proposed sending a probe to Alpha Centai 4
light years away. His idea is to use a "solar sail", which is a
large area reflective sheet, and propelling the spacecraft to 10%
of the speed of light using a high powered laser. If the laser
sends 1200 nm light at the sail and the power reaching the
reflective sheet is 1500 W:
(a) What is the force due to light pressure on the reflective
sheet, assuming the...
Cameras have various mechanisms to control how the light falls
onto the light-sensitive surface. Lenses focus the light entering
the camera, the size of the aperture can be widened or narrowed to
let more or less light into the camera, and a shutter mechanism
determines the amount of time the photosensitive surface is exposed
to the light.
- Write a short report in 5 pages (Word File) about how a camera
is used as an optical instrument used to record...
Determining a Star’s Velocity
(1) For “moving away,” a red ray of light moved from the star to
Earth. Then a spectrum appeared in the bottom half of the screen.
Which statement about the spectrum on the bottom relative to the
spectrum of the stationary star is correct?(A)The two spectra are
exactly the same. (B)The dark lines in the bottom spectrum are
shifted to the right. (C)The dark lines in the bottom spectrum are
shifted to the left. (D)There are...
1. The binding energy of the photoelectrons of a surface is 1.8
eV. Blue light of wavelength 4.8 x 10^-7 m falls on the
surface.
Find
a) kinetic energy of the ejected photoelectrons in eV,
b) the voltage required to stop the photoelectrons from leaving
the surface.
1. Light of wavelength 620nm in air is incident on a surface of
a flat piece of glass with an index of refraction of
1.50 with an angle of incidence of 30°.
a.What is the angle of refraction?
-Answer: 19.5°
b. Find the wavelength and frequency of light in glass.
Answer: 413nm, 4.84x1014Hz
c.Explain under what circumstances “total internal reflection”
can be observed at the boundary between air
and this piece of glass. Be as specific as possible.