Question

If a ship is sending a 600 nm wavelength signal to Earth during an entire trip, what frequency would the Earth receive when the ship is travelling away and travelling back.

Answer #1

A distant galaxy emits light that has a wavelength of 620 nm. On
Earth, the wavelength of this light is measured to be 623 nm.
a. Is this galaxy approaching or receding from the earth?
b. Find the speed of the galaxy relative to earth.
c. If this galaxy also emits another EM wave whose wavelength is
1025nm, what wavelength would we expect to measure on Earth for
this wave?

An interference pattern is produced by light with a wavelength
600 nm from a distant source incident on two identical parallel
slits separated by a distance (between centers) of 0.500 mm .
Part A
If the slits are very narrow, what would be the angular position
of the first-order, two-slit, interference maxima?
Part B
What would be the angular position of the second-order,
two-slit, interference maxima in this case?
Part C
Let the slits have a width 0.330 mm ....

Red light with wavelength 600[nm] is incident from air (n = 1.0)
onto a thin film of index n = 1.5. The thin film coats a thick slab
of material which has index n = 2.0.
1: For what minimum film thickness would the thin film produce
no significant overall reflection due to destructive
interference?
2: Did the reflections off of those two interfaces have the same
phase change (both 0º or both 180º)? Or did the reflections off of...

A bright star 20 light-years away emits violet light with
wavelength of 380 nm as seen from the earth. A spaceship is covered
with tinanium on its surface, whose work function is 4.3 eV.
a) When the spaceship is stationed on earth, determine whether
photoelectrons are ejected from the spaceship due to the violet
starlight. If so, compute their maximum kinetic energy.
b) The spaceship has just departed earth (with negligible travel
distance so far) and is flying towards the...

Consider monochromatic light at a wavelength 600 nm with
intensity 100 mW/cm2. (i) Calculate the photon flux, defined as
photons/cm2/s. (ii)If we use the beam in (i) to illuminate a
perovskite solar cell (bandgap 1.5 eV), what is the maximum short
circuit current we can expect from our solar cell if its area is 2
cm2? (iii)If the open-circuit voltage of the cell in (ii) is 0.8V
and its Fill Factor is 0.75, what is the maximum power that the...

⦁ A person sitting in a stationary boat notices that
it takes the water waves 2 seconds to pass the entire length of the
boat that is 12 m. Calculate the speed of the water waves. Show
your calculation.
12/2 = 6m/s
⦁ The person in Question #1 also notices the water
waves passing by the bow of the ship once every 4 seconds. b) What
are the frequency and c) the wavelength of the water waves? Show
all your...

1/ Alpha Centauri A is a star that is remarkably like
our Sun...indeed, we can think of it as the Sun’s stellar twin.
Alpha Centauri A lies at a distence of 4.4 light-years from Earth,
and it has a luminosity of 5.88 x 10^26 W.
Calculate the apparent brightness of Alpha Centauri
A
Suppose you have a light bulb that emits 100 W of
visible light. How far away from you would you need to put that
light bulb in...

1) 2 point charges are separated by a distance of 8 cm. The left
charge is 48 mC and the right charge is -16mC. Using a full sheet
of paper: draw the 2 charges separated by 8cm, centered in the
sheet. (if you are missing a ruler estimate 8cm as ⅓ a paper sheet
length). [6] a) Draw field lines to indicate the electric fields
for this distribution. [4] b) Draw 3 equipotential surfaces, 1
each, that pass: -Through the...

Instructions:
Please complete the 2017 federal income tax return for Magdalena
Schmitz. Ignore the requirement to attach the form(s) W-2 to the
front page of the Form 1040. If required information is missing,
use reasonable assumptions to fill in the gaps. Make sure you
include all necessary schedules and tax forms.
Magdalena Schmitz has undergone some major changes in her life
recently. In 2015, at the age of 46, her husband, Roger, passed
away. Magdalena has not remarried as of...

Nancy
-feels tired all the time
-suffers from back pain and burning sensation in lower part of
her chest
-Both do not watch what they eat and eat in abundance
-Nancy is possibly experiencing angina equivalent symptoms
Jim retired last year after 40 years in sales. He had suffered a
massive heart attack a few years earlier and now takes medication
to control his blood pressure as well as an aspirin every night. He
is 68 years old, overweight, and...

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