Linked Questions

14
votes
2answers
1k views

The speed of light upon reflection [duplicate]

(NOTE: I am an 8th grader, so I may not be capable of perfectly elaborating my point by scientific measures. Also, English is not my first language) I have read that the speed of light is constant, ...
5
votes
2answers
487 views

How does light change directions? [duplicate]

To the best of my knowledge, light will always travel at the speed of light. How then does it get reflected and change directions? Wouldn't it have to decelerate, come to a stop, and then accelerate ...
0
votes
1answer
103 views

How is reflection of light possible at all? [duplicate]

If a photon cannot be accelerated or decelerated, how is reflecting them possible at all?
0
votes
2answers
130 views

Acceleration of a particle at the speed of light [duplicate]

Let's take a particle with the speed of light and throw it to a reflective surface with a 90 degree angle. We know that the speed of light is constant thus this particles speed is constant. But doesn'...
1
vote
1answer
89 views

Speed of light when it reflects from a surface [duplicate]

I have studied in school that the speed of light is always a constant, my question is what is happening when it reflect from a surface? when it hit a surface weather the velocity reached to zero and ...
1
vote
0answers
83 views

How does reflection work at a quantum level? [duplicate]

Thinking of light in corpuscular form, how does the bouncing of a photon off a reflective surface work? Is it the same photon bouncing off, or is it absorbed and re-emitted? If it's bouncing, does it ...
0
votes
0answers
73 views

Does light accelerate when it meets a surface? [duplicate]

Does light accelerate when it meets a surface like mirror, we know that light changes path when it meets a surface like mirror.If light changes path,even if travelling at c,this means light has ...
2
votes
1answer
61 views

Does Light (EM Signal) undergo accelration during reflection? [duplicate]

Since Average acceleration is defined as, Average acceleration over a period of time is the change in Velocity divided by the Duration of the Period. Does Light (EM Wave) undergo acceleration during ...
0
votes
0answers
38 views

Speed of light during reflection [duplicate]

Does light hitting a mirror stop before being reflected. And if so does it have to accelerate back up to the speed of light. In other words, when light is emitted by any means is it instantly ...
1
vote
0answers
37 views

Photon behaviour [duplicate]

What happens when a photon hits a mirror? Does the photon decelerate instantaneously to zero and then accelerates instantaneously to the velocity of light when it is reflected from the mirror? How do ...
23
votes
1answer
24k views

How does a photon travel through glass?

This was discussed in an answer to a related question but I think that it deserves a separate and, hopefully, more clear answer. Consider a single photon ($\lambda$=532 nm) traveling through a plate ...
13
votes
2answers
7k views

How do mirrors work?

My physics professor explained to me that electromagnetic waves are consisted of two components - electric and magnetic - which cause each other. Which part of the mirror actually reflects the wave? ...
3
votes
4answers
13k views

Does light accelerate or slow down during reflection?

After all, it does change direction when reflection occurs. So shouldn't it also accelerate? And since the acceleration cannot increase the speed of light, mustn't it slow down?
2
votes
2answers
1k views

Do photons bounce at mirrors? [duplicate]

I am referring to the simple mirror. How can a photon be reflected and what does that mean? Does it instantaneously reverse direction (in the case of 180 degree bounce), does it loose energy? What ...
7
votes
3answers
503 views

What happens at the QM level with a photon hitting a mirror?

I have read these questions: Reflection of light at a microscopic level About photons and mirrors Photons and perfect mirror Do photons bounce at mirrors? How do mirrors work? What happens when a ...

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