Why can't we walk through opaque objects like poles?
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Light waves cause vibrations in surface atoms, which are either absorbed, transmitted or reflected. ... If the energy only causes vibrations in the surface before reflecting off the object, then the object appears opaque. Therefore, opacity is caused by the reflection of light waves.
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hello frnd....^_^
Why are some objects opaque? They absorb light instead of allowing it to pass through. What happens microscopically is that the photons interact with the atoms and molecules forming the object. These molecules can absorb the photons and undergo some transitions, for example.
The interaction between light and matter is very frequency dependent. Molecules absorb strongest at certain frequencies, becoming transparent at both higher and lower frequencies. This is the reason why glass which is transparent for us is highly opaque under ultraviolet light. There could be multiple molecular absorption peaks — water has absorption peaks both at higher and lower frequencies than visible light.
Similarly, metals which are very reflective and opaque for lower frequencies start becoming transparent at frequencies higher than the plasma frequency. As we increase the frequency of light further and further to X-rays and finally to gamma rays, their penetration depth increases as well because of this.
hope its help U... my Frnd
Why are some objects opaque? They absorb light instead of allowing it to pass through. What happens microscopically is that the photons interact with the atoms and molecules forming the object. These molecules can absorb the photons and undergo some transitions, for example.
The interaction between light and matter is very frequency dependent. Molecules absorb strongest at certain frequencies, becoming transparent at both higher and lower frequencies. This is the reason why glass which is transparent for us is highly opaque under ultraviolet light. There could be multiple molecular absorption peaks — water has absorption peaks both at higher and lower frequencies than visible light.
Similarly, metals which are very reflective and opaque for lower frequencies start becoming transparent at frequencies higher than the plasma frequency. As we increase the frequency of light further and further to X-rays and finally to gamma rays, their penetration depth increases as well because of this.
hope its help U... my Frnd
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