What is the relationship between intensity and amplitude?

  • Context: Undergrad 
  • Thread starter Thread starter Raghav Gupta
  • Start date Start date
  • Tags Tags
    Intensity
Click For Summary
SUMMARY

The relationship between intensity and amplitude in wave physics is defined by the principle that intensity is proportional to the square of the amplitude. This is particularly relevant in the context of electromagnetic (EM) waves, where intensity is derived from both the electric and magnetic fields. The discussion references NCERT examples 8.5 and 10.4, which illustrate the concepts of intensity and fringe formation in wave optics, emphasizing the significance of the size of the light source in relation to the slit distance.

PREREQUISITES
  • Understanding of wave optics principles
  • Familiarity with electromagnetic wave theory
  • Knowledge of intensity and amplitude relationships
  • Basic grasp of fringe formation in interference patterns
NEXT STEPS
  • Study the derivation of intensity in electromagnetic waves
  • Explore the concept of fringe formation in detail using NCERT example 10.4
  • Investigate the mathematical relationship between light source size and slit distance
  • Learn about energy density in wave mechanics
USEFUL FOR

Students of physics, educators teaching wave optics, and anyone interested in the fundamentals of electromagnetic wave behavior and interference patterns.

Raghav Gupta
Messages
1,010
Reaction score
76
I think basic definition of intensity is power by area.
How intensity is square of the amplitude?
How intensity is energy density times speed of thing?
How in a radiation of EM wave,
Half of the intensity is provided by elec.field and other by magnetic field?
 
  • Like
Likes   Reactions: Maged Saeed
Science news on Phys.org
NCERT example 8.5 right?
 
AdityaDev said:
NCERT example 8.5 right?
Yeah, I got all the answers of that by some searching.
Can you answer this one,
In wave optics
taking size of light source =s and distance from 2 slits S,
How s/S <= λ/d
for the fringe formation to take place?
 
Last edited:
Size of light source??
 
AdityaDev said:
Size of light source??
As in NCERT example 10.4 (d) .
 

Similar threads

  • · Replies 17 ·
Replies
17
Views
3K
  • · Replies 17 ·
Replies
17
Views
5K
  • · Replies 2 ·
Replies
2
Views
2K
  • · Replies 2 ·
Replies
2
Views
3K
  • · Replies 3 ·
Replies
3
Views
2K
  • · Replies 1 ·
Replies
1
Views
2K
  • · Replies 1 ·
Replies
1
Views
2K
Replies
4
Views
16K
  • · Replies 11 ·
Replies
11
Views
6K
  • · Replies 5 ·
Replies
5
Views
3K