Crosswords3 mins ago
Light Energy
1.
Given that a human eye receives 'photons' of light energy to 'see'
and interpret a view in front of us - consider a room 10 foot x 10
foot x 8 foot high with no contents with a light cream coloured
slightly patterned wallpaper, lit by a normal single 100 watt
incandescent bulb hanging 1 foot down from the ceiling centre.
Approximately how many photons are being received by the eye per
second to be able to 'perceive' the room within the brain ?
2.
Given that answer then how many photons of light energy exist within
the room each second ?
3.
Further, assuming that the light bulb is emitting a constant stream
of photons, but the room is not growing lighter, then what happens
to all these photons when they alight upon the various surfaces -
walls, ceiling, clothes, face, eyes ?
4.
What mass does a photon have, and has this been proved or is it a
theory or assumption or ??
Given that a human eye receives 'photons' of light energy to 'see'
and interpret a view in front of us - consider a room 10 foot x 10
foot x 8 foot high with no contents with a light cream coloured
slightly patterned wallpaper, lit by a normal single 100 watt
incandescent bulb hanging 1 foot down from the ceiling centre.
Approximately how many photons are being received by the eye per
second to be able to 'perceive' the room within the brain ?
2.
Given that answer then how many photons of light energy exist within
the room each second ?
3.
Further, assuming that the light bulb is emitting a constant stream
of photons, but the room is not growing lighter, then what happens
to all these photons when they alight upon the various surfaces -
walls, ceiling, clothes, face, eyes ?
4.
What mass does a photon have, and has this been proved or is it a
theory or assumption or ??
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