How do we detect photons?

  • #1
How can we detect photons without mass ?

In the experiment that was showing two photons hitting the detector when only 1 was fired through the slit, how did technology detect photons without mass to hit the detector ?
 

Answers and Replies

  • #2
Nugatory
Mentor
13,316
6,238
How can we detect photons without mass ?
In the experiment that was showing two photons hitting the detector when only 1 was fired through the slit, how did technology detect photons without mass to hit the detector ?
Google for "photomultiplier".
Or you can use a piece of photographic film. When you develop the film, you get a dot wherever a photon landed.

However, I'm not sure which experiment you mean when you're asking about "the experiment that was showing two photons hitting the detector when only 1 was fired through the slit"
 
  • #3
906
223
Your phone camera is a photon detector more common than PMT. Easy to Google.
 
  • #4
Drakkith
Staff Emeritus
Science Advisor
21,136
4,974
How can we detect photons without mass ?

Photons still have energy and momentum, despite having zero mass. Thus they can still be detected.
 
  • #5
Vanadium 50
Staff Emeritus
Science Advisor
Education Advisor
26,715
10,277
Your phone camera is a photon detector more common than PMT.

And your eye is more common than your phone camera.
 
  • #6
906
223
And green leaves are more common than eyes.
 

Related Threads on How do we detect photons?

  • Last Post
Replies
24
Views
1K
Replies
4
Views
2K
Replies
11
Views
4K
  • Last Post
Replies
7
Views
2K
Replies
0
Views
163
Replies
3
Views
679
Replies
8
Views
3K
Replies
4
Views
999
Replies
12
Views
3K
Top