Light on the Walls?

Light from any source may shine through a hole or even reflect off of available mirrors and may move if the source is moving (the moon or distant car lights?). It would be necessary to approach the light and use a card, etc. to see if the light path can be blocked or to place your head where the light is on the wall and look for a shiny source. In a darkened room the Irises of the eyes open wide (dilate) and any source of light will look much brighter than usual. Also look at the light on the wall both directly and through the corner of your eye. In a darkened room color may not be evident because the eye is using (black and white sensing) rods rather than (color sensing) cones. Direct vision sees colors but black and white is best viewed by peripheral vision

1. Streaks of light on film negatives?

Vertical streaks makes me think that light was coming in from the little hole the film comes out of (the canister). When changing film be sure to do it in very subdued light. I am gussing when your changing film, light is coming in there and causing the streak.

2. EMF What would happen if I touched a plasma ball/electric orb with one hand and touched a light bulb?

A normal light bulb will achieve nothing. You need a fluorescent tube. An ordinary bulb needs a high current to make the filament glow. A fluorescent bulb will glow faintly with even the tiniest of currents. So the small amount of induced current in you can make little glimmers of light. The tube has a high resistance so it responds to low currents and high emf. Your body is full of low resistance salty fluids and any harm to you is caused by high current flow. In this particular experiment then the low currents do not affect you but the high emf makes the tube glow.

3. At the speed of light, does the clock stop and the light make the trip to what seems like instantly?

In the words of Luke Skywalker:Amazing. Every word of what you just said was wrong.There is no clock to ask does the clock to stop about.The trip is not instantaneous.There is no observer at the speed of light to say apply and make the trip to what seems like to. Explanation: Four important points:Your clock never stops.Time is undefined at the speed of light.And zero proper time occurs between events separated by the speed of light in a vacuum.The sequence of cause and effect is defined even at the speed of light. The first point is simply no matter how fast you go, you always have a rest frame. In that rest frame, your clock runs at a normal rate.The second point is it impossible to define a clock that works at the speed of light. Our definition of a second is simply incompatible, and any attempts to fix that definition either ends up with an inconsistency, or still does not have a clock defined that works at the speed of light.The zero proper time is simply special relativity:(c Delta tau)^2 = (c Delta t)^2 - (Delta x)^2 - (Delta y)^2 - (Delta z)^2 (Delta tau)^2 = (1-dfracv^2c^2)(Delta t)^2 Where tau is proper time.The fourth point is most important. The sequence is still defined. Lets say your beam of light forms an interference pattern with another beam of light crossing it's path. Then we can define a sequence of events as:EmissionInterferenceAbsorptionEven though there is 0 proper time between these three events, they still happen in this sequence, and only this sequence. As such it would be false to say events are instantaneous.What is further, is even though I cannot define a clock at the speed of light, I can define a sequence of events. I can A happens, then B, then C. Since the sequence is departure and then arrival, I would say by that definition they are not instantaneous, in that instantaneous to me means no defined sequence, or chain of cause and effect. I could have a weak measurement in the middle here such as an interference pattern formed with another beam of light. That too then, would have a definite order in the sequence for a photon: emission, interference, absorption. The sequence of cause and effect is defined, even at the speed of light.If you start to factor in quantum mechanics this on more meaning. It takes an average of 1/2 a period for a photon to be emitted, and 1/2 the period for a photon to be absorbed. Both of those events take place in a rest frame. So those two steps do have a proper time associated with them.Joke answer to a non-sense question.At the speed of light, does the clock stop and the light make the trip to what seems like instantly?.

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Could You Answer These Questions for Me?
Could you answer these questions for me?Finally and question I can help someone with =P. Ok, The sky is blue because the molecule water tends to only reflect blue light back into space, since our planet is about 75% water, you can imagine how much blue light is being relected back into space during the daytime. It makes our sky blue. All the other color lights, water absorbs more.(red green yellow orange ect.) Apples are red because the skin of an apple reflects more red light back into space, and it absorbs more af the other colors (blue, yellow orange, green ect.) Im guessing if the apple is placed behind a red filter it would become white. When you turn the volume up the sound wave increases in intensity, which makes the sound wave higher in decibals and I am not sure on this but I think it speeds of the wave's frequency you will have to look that up.— — — — — —Difference between Green and Blue light?Green has More Wavelength than Blue; The Fringe Width in Young Double slit Expt is Directly proportional to wavelength of the color As Green has more wavelength than Blue the fringe width increases— — — — — —I am looking for an emergency blue light?need a permit from your dmv or police dept if your with a volunteer fire dept they can help with that— — — — — —What is the tool called that emits blue light?Light is an electromagnetic wave. You are right in saying that all EM radiation travels at the same speed. Light is just a range in the spectrum of EM radiation. Microwaves, radio waves, cosmic rays are all different frequencies of the same things. But light also behaves as a particle. This was demonstrated in experiments. This caused a lot of confusion among physicists for a long time. In the end, it's now recognized that light (as well as most particles) behave both as waves and as particles. The phenomenon is called Wave-particle duality and it is an important part of quantum physics. Light's speed however CAN be changed. It does so everytime it changes medium. The speed of light (297792458 m/s) is its speed in a vacuum. It slows down when it is in a denser medium (air, water, etc). This is what causes refraction. You can observe refraction when you put a pencil in a glass of water. The pencil looks bent. This is due to the change in speed of light. Light does NOT have mass. This is why it can travel so fast. For complicated reasons (see Einstein's theory of relativity) it would require infinite energy for it to travel at that speed if it had mass. But it IS affected by gravity. Einstein explained this in the same theory. Great mass bends space-time. This is the cause of gravity. Think of a sheet of rubber, streched tightly. If you put a heavy metal ball in the center, it will bend the sheet. If you then put another smaller ball, it will be "drawn" to the big one. As well, if you tried to draw a line, it would be difficult to draw it straight, the tendency would be to have it curve, evn though the line has no mass. That is basically what happens to light. This has been confirmed in observations. Astronomers have seen light being bent around stars. But keep in mind that not all of this is yet resolved. There are some inherent contradictions between the theory of relativity (which explains gravity well) and the quantum theory (which explains the particle-wave behavior of light well) that have not been resolved yet. Wikipedia is a good place to look for more information.— — — — — —What is that blue light that they shine in your mouth when getting fillings at the dentist's office?The blue light is used to cure certain materials. For example the composite materials we use for doing fillings is made up of a lot of really small parts (monomers) and what we really want is for these to link up into chains (polymers). To get this reaction going we "activate" the material by shining blue light (wave length around 480nm if I recall correctly) on it. The materials contain a certain particles, when hit by this wavelength, releases a free radical which in turn starts the formation of the polymer chains
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