All Questions
11
questions
6
votes
3
answers
743
views
When designing antennas which speed of light should be used?
When calculating "antenna element length" should we use the speed of light in the "medium between transmitter and receiver (antenna)" or the speed of light in the "element ...
- 613
6
votes
6
answers
2k
views
What ties high frequency electromagnetic waves to short wavelength and converse?
Why is it not possible to have waves with high frequency (high energy) and great wavelength and converse?
What physical quantity ties frequency to wavelength in an inversely proportional way?
- 71
1
vote
1
answer
597
views
Does $f = (c + v) /$wavelength?
If I'm heading at some given velocity into an electromagnetic wave with some given wavelength.
From my POV it would appear as if the wave has sped up towards me and as a consequence the wavelength of ...
- 335
3
votes
2
answers
81
views
Speed of light vs wavelength due to gravitational lensing - straight path versus curved path
Non-physicist asking.
Note: I see that there are similar questions but none that I can find that addresses this specific query.
Exaggerated diagram
Question
If the two beams of light leave the ...
- 3,006
0
votes
1
answer
36
views
Energy of light
If a beam of light is travelling in full vacuum in same medium ,then , the energy of the light beam will decrease or not while moving through space ? The wavelength of the beam of light will change ...
0
votes
1
answer
3k
views
How to find the speed of a single photon?
Firstly with the help of $E= hf$ I calculated the energy by taking the frequency of light as $6 \times 10^{14}\ \rm Hz$(the range of frequency of light is from $4$ to $8\times10^{14}\ \rm Hz$ so I ...
- 11
1
vote
2
answers
156
views
Different wavelengths of light in vacuum need to travel at different rates?
Quick question that started bothering me today. Wouldn't different wavelengths of light need to travel at different speeds in vacuum to obtain $c$ due to a longer travel path?
I'm obviously not ...
5
votes
3
answers
7k
views
Maximum wavelength of a photon/electromagnetic radiation?
This asked:
What is the minimum wavelength of electromagnetic radiation?
And also this:
What is the maximum possible frequency and wavelength?
The second question is contradictory; maximum ...
- 2,449
2
votes
1
answer
161
views
Is information about the speed of light hidden in its spectrum?
Can the speed of light in the vacuum (c) be inferred from the spectrum of light?
If that is not the case is it possible to tell from lights spectrum that it has entered a different medium, e.g. can ...
- 423
25
votes
6
answers
129k
views
Do all frequencies of light have the same speed?
Is there any speed difference between blue or red light? Is there ever a speed difference? Or do all types of light move at the same speed?
- 939
41
votes
4
answers
191k
views
Why does wavelength change as light enters a different medium?
When light waves enter a medium of higher refractive index than the previous, why is it that:
Its wavelength decreases?
The frequency of it has to stay the same?
- 4,607