1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Mashcka [7]
3 years ago
14

What in the world is infrared radiation

Physics
1 answer:
alexandr402 [8]3 years ago
7 0

Infrared radiation is heat that travels from one place to another
in the form of electromagnetic waves.

It's called "infrared" because its wavelength is just past the
longest visible light ... the next category with wavelengths
longer than red light.

Infrared radiation is how heat gets here from the sun, and how
you feel the heat from a fireplace or a campfire when you stand
20 feet away from them.  When that happens, your front gets
toasty while your back stays cold, so you know it's not a matter
of any warm air around you that's warming you.  It's the infrared
electromagnetic radiation direct from the fire to your skin.

You might be interested in
True or false earth orbit is nearly circular
Simora [160]
The answer would be true
4 0
3 years ago
Read 2 more answers
Assume (unrealistically) that a TV station acts as a point source broadcasting isotropically at 3.2 MW. What is the intensity of
Dahasolnce [82]

Answer:

I=1.5\times10^{-28}W/m^2

Explanation:

The intensity is related to the power and surface area by I=\frac{P}{A}=\frac{P}{4\pi r^2}. We need to calculate the surface area of a sphere of radius r=4.3ly.

Since 4.3ly is the distance light travels in 4.3 years at 299792458m/s, we can obtain it in meters by doing:

r=vt=(299792458m/s)(4.3\times365\times24\times60\times60s)=4.1\times10^{16}m

So we have:

I=\frac{P}{4\pi r^2}=\frac{3.2\times10^6W}{4\pi (4.1\times10^{16}m)^2}=1.5\times10^{-28}W/m^2

4 0
3 years ago
A yet-to-be-built spacecraft starts from Earth moving at constant speed to the yet-tobe-discovered planet Retah, which is 20 lig
Gre4nikov [31]

Answer:

The  time elapsed at the spacecraft’s frame is less that the time elapsed at earth's  frame

Explanation:

From the question we are told that

The distance between earth and Retah is  d = 20 \ light \ hours =  20 * 3600 *  c =  72000c \ m

Here c is the peed of light with value c =  3.0*10^8 m/s

The time taken to reach Retah from earth is  t =  25 \ hours  =  25 * 3600 =90000 \ sec

The velocity of the spacecraft is mathematically evaluated  as

     v_s =  \frac{d }{t}

substituting values

   v_s =  \frac{72000 * 3.0*10^{8} }{90000}

    v_s =  2.40*10^{8} \ m/s

The time elapsed in the spacecraft’s frame is mathematically evaluated as

      T  =  t *  \sqrt{ 1 -  \frac{v^2}{c^2} }

substituting value

       T  =  90000 *  \sqrt{ 1 -  \frac{[2.4*10^{8}]^2}{[3.0*10^{8}]^2} }

        T = 54000 \ s

=>    T  = 15 \ hours

So  The  time elapsed at the spacecraft’s frame is less that the time elapsed at earth's  frame

       

7 0
3 years ago
What would be the result of an alpha particle coming into a magnetic field?
Aneli [31]
The right answer for the question that is being asked and shown above is that: "C) The alpha particle will be deflected in a curve path. " the result of an alpha particle coming into a magnetic field is that <span>C) The alpha particle will be deflected in a curve path. </span>
8 0
3 years ago
Read 2 more answers
Which of the following statements about blood alcohol concentration (BAC) are true?
mars1129 [50]
D) Neither A or B are correct
5 0
2 years ago
Read 2 more answers
Other questions:
  • A radiation worker is subject to a dose of 200 mrad/h of maximum QF neutrons for one 40 h work week. How many times the yearly a
    5·1 answer
  • How would you graph/sketch 40 lbs at pi/3 south of west
    9·1 answer
  • Some of three vectors which have same magnitude
    12·1 answer
  • Which experimental result led to the inference that atoms contained electrons?
    5·2 answers
  • Is kicking a ball a conservation of momentum ?
    14·1 answer
  • A car travels 60 km in the first 2 hours and 68 km in the next 2 hours. what is the cars average speed ?
    10·1 answer
  • A shopper is pushing a cart down a grocery store aisle. Starting from rest, the shopper applies a constant force to the cart for
    7·2 answers
  • 4) A basketball is launched at a velocity of 25 m/s in a direction making an angle of 50° upward with the
    7·1 answer
  • There are pros and cons to both e-readers and paper books. Do you think the pros outweigh the cons more for modern electronic re
    12·1 answer
  • If I want to calculate the normal force of an object on two legs but the weight of the object is not uniform throughout, how do
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!