Blue light and an opaque object

  • Thread starter Thread starter daNAV1GATOR
  • Start date Start date
  • Tags Tags
    Light
daNAV1GATOR
Messages
45
Reaction score
0
I need help with a problem that was discussed here on PF also...

Snazzy, (or anybody! =) ] I need your thoughts again please!

QUESTION:
When blue light strikes an opaque object whose resonant frequency is lower than the frequency of blue light, what happens?
A- The amplitude of the vibrations of the electrons in the object become larger.
B- The object becomes warm
C- The blue light is absorbed without reemission
D- The blue light is reflected by the electrons in the object
E- The blue light is transmitted through the object

...This is a very tough one for me...

...'Security''s answer was B, The object becomes warm.

PF Admin Warren ('chroot') said, ""Becomes warm" means the same thing as "vibrates more rapidly." So this is not correct. If the light does not meet the material's "resonant frequency" (this is a bad way to describe this, by the way) then it will pass right through."
----He said "it will pass right through."

This guy on Yahoo! Answers said "Blue light should be reflected"
Another said "You see the blue light on it"


ARGH! I'M SO CONFUSED!



I am open to discuss this problem... if you don't want to give me your answer...
But it's pretty late here in the East Coast... so... well anyway, HELP! =)



 
on Phys.org
If the blue light is higher in frequency than the resonance frequency, and since the object is opague (presumably a metal), then the blue light will be reflected by the plasma electrons.
 

Similar threads

  • · Replies 22 ·
Replies
22
Views
3K
  • · Replies 2 ·
Replies
2
Views
2K
  • · Replies 4 ·
Replies
4
Views
3K
  • · Replies 3 ·
Replies
3
Views
5K
  • · Replies 9 ·
Replies
9
Views
3K
  • · Replies 2 ·
Replies
2
Views
2K
Replies
2
Views
6K
  • · Replies 8 ·
Replies
8
Views
2K
  • · Replies 12 ·
Replies
12
Views
4K
  • · Replies 13 ·
Replies
13
Views
4K