-
Home
- College physics
- Special relativity
- Relativistic addition of
Conceptual questions
Is the relativistic Doppler effect consistent with the classical Doppler effect in the respect that
is larger for motion away?
Got questions? Get instant answers now!
All galaxies farther away than about
exhibit a red shift in their emitted light that is proportional to distance, with those farther and farther away having progressively greater red shifts. What does this imply, assuming that the only source of red shift is relative motion? (Hint: At these large distances, it is space itself that is expanding, but the effect on light is the same.)
Got questions? Get instant answers now!
Problems&Exercises
Suppose a spaceship heading straight towards the Earth at
can shoot a canister at
relative to the ship. (a) What is the velocity of the canister relative to the Earth, if it is shot directly at the Earth? (b) If it is shot directly away from the Earth?
(a)
(b)
Got questions? Get instant answers now!
If a spaceship is approaching the Earth at
and a message capsule is sent toward it at
relative to the Earth, what is the speed of the capsule relative to the ship?
Got questions? Get instant answers now!
(a) Suppose the speed of light were only
. A jet fighter moving toward a target on the ground at
shoots bullets, each having a muzzle velocity of
. What are the bullets’ velocity relative to the target? (b) If the speed of light was this small, would you observe relativistic effects in everyday life? Discuss.
Got questions? Get instant answers now!
If a galaxy moving away from the Earth has a speed of
and emits
light characteristic of hydrogen (the most common element in the universe). (a) What wavelength would we observe on the Earth? (b) What type of electromagnetic radiation is this? (c) Why is the speed of the Earth in its orbit negligible here?
a)
b) red
c)
(negligible)
Got questions? Get instant answers now!
A space probe speeding towards the nearest star moves at
and sends radio information at a broadcast frequency of 1.00 GHz. What frequency is received on the Earth?
Got questions? Get instant answers now!
If two spaceships are heading directly towards each other at
, at what speed must a canister be shot from the first ship to approach the other at
as seen by the second ship?
Got questions? Get instant answers now!
Two planets are on a collision course, heading directly towards each other at
. A spaceship sent from one planet approaches the second at
as seen by the second planet. What is the velocity of the ship relative to the first planet?
Got questions? Get instant answers now!
When a missile is shot from one spaceship towards another, it leaves the first at
and approaches the other at
. What is the relative velocity of the two ships?
Got questions? Get instant answers now!
Near the center of our galaxy, hydrogen gas is moving directly away from us in its orbit about a black hole. We receive 1900 nm electromagnetic radiation and know that it was 1875 nm when emitted by the hydrogen gas. What is the speed of the gas?
Got questions? Get instant answers now!
A highway patrol officer uses a device that measures the speed of vehicles by bouncing radar off them and measuring the Doppler shift. The outgoing radar has a frequency of 100 GHz and the returning echo has a frequency 15.0 kHz higher. What is the velocity of the vehicle? Note that there are two Doppler shifts in echoes. Be certain not to round off until the end of the problem, because the effect is small.
Got questions? Get instant answers now!
Prove that for any relative velocity
between two observers, a beam of light sent from one to the other will approach at speed
(provided that
is less than
, of course).
, so
Got questions? Get instant answers now!
Show that for any relative velocity
between two observers, a beam of light projected by one directly away from the other will move away at the speed of light (provided that
is less than
, of course).
Got questions? Get instant answers now!
(a) All but the closest galaxies are receding from our own Milky Way Galaxy. If a galaxy
ly away is receding from us at 0.
, at what velocity relative to us must we send an exploratory probe to approach the other galaxy at
, as measured from that galaxy? (b) How long will it take the probe to reach the other galaxy as measured from the Earth? You may assume that the velocity of the other galaxy remains constant. (c) How long will it then take for a radio signal to be beamed back? (All of this is possible in principle, but not practical.)
a)
b)
c)
(all to sufficient digits to show effects)
Got questions? Get instant answers now!
Questions & Answers
Discuss the differences between taste and flavor, including how other sensory inputs contribute to our perception of flavor.
taste refers to your understanding of the flavor . while flavor one The other hand is refers to sort of just a blend things.
Faith
While taste primarily relies on our taste buds, flavor involves a complex interplay between taste and aroma
Kamara
which drugs can we use for ulcers
Omeprazole
Cimetidine / Tagament
For the complicated once ulcer - kit
Patrick
what is the function of lymphatic system
to drain extracellular fluid all over the body.
asegid
The lymphatic system plays several crucial roles in the human body, functioning as a key component of the immune system and contributing to the maintenance of fluid balance. Its main functions include:
1. Immune Response: The lymphatic system produces and transports lymphocytes, which are a type of
asegid
to transport fluids fats proteins and lymphocytes to the blood stream as lymph
Adama
Anatomy is the identification and description of the structures of living things
Kamara
what's the difference between anatomy and physiology
Anatomy is the study of the structure of the body, while physiology is the study of the function of the body. Anatomy looks at the body's organs and systems, while physiology looks at how those organs and systems work together to keep the body functioning.
AI-Robot
what is enzymes all about?
Enzymes are proteins that help speed up chemical reactions in our bodies. Enzymes are essential for digestion, liver function and much more. Too much or too little of a certain enzyme can cause health problems
Kamara
how does the stomach protect itself from the damaging effects of HCl
little girl okay how does the stomach protect itself from the damaging effect of HCL
Wulku
it is because of the enzyme that the stomach produce that help the stomach from the damaging effect of HCL
Kamara
function of digestive system
function of digestive
Ali
what is the normal body temperature
please why 37 degree selcius normal temperature
Mark
the normal temperature is 37°c or 98.6 °Fahrenheit is important for maintaining the homeostasis in the body
the body regular this temperature through the process called thermoregulation which involves brain skin muscle and other organ working together to maintain stable internal temperature
Stephanie
anaemia is the decrease in RBC count hemoglobin count and PVC count
Eniola
what is the pH of the vagina
how does Lysin attack pathogens
Diya
I information on anatomy position and digestive system and there enzyme
anatomy of the female external genitalia
Got questions? Join the online conversation and get instant answers!
Source:
OpenStax, College physics. OpenStax CNX. Jul 27, 2015 Download for free at http://legacy.cnx.org/content/col11406/1.9
Google Play and the Google Play logo are trademarks of Google Inc.