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How does the speed of light change in jello?
Light travels through different substances at different speeds. The speed will changeas it enters jello from something else, and again as it leaves jello and enters somethingelse. While the light is in the jello its speed is constant. A few on-line resources that wechecked gave that speed as roughly 217,400,000 meters per second. That's about73% of the speed of light in vacuum.
How do you use snell's law to find the speed of light in jello?
Snell's law combines trigonometry and refractive indices to determine different aspects of refraction. The law is as follows: (n1)(sinX1) = (n2)(sinX2); where n1 is the refractive index of the first medium, X1 is the angle of incidence (the angle between the incident ray and the normal), n2 is the refractive index of the second medium, and X2 is the angle of refraction (the angle between the refracted ray and the normal). Setting up an experiment using jello and a laser, one can determine the index of refraction in the jello. Shine the laser at an arbitrary angle and record this angle. Then measure the refractive angle seen in the jello (this is the angle between the ray in the jello and the normal). The index of refraction for air is 1.0003. Now substitute all three values into Snell's law and solve for n2, the refractive index of jello. An index of refraction is defined as the speed of light in a vacuum divided by the speed of light in a medium. Once n2 is determine, use the following equation: n2 = c / v. Substitute n2 and the speed of light in a vacuum (which is approximately 299,792,458 meters per second), and solve for v. The value obtained will be the speed of light in jello.
How do laser-ranging devices work?
They bounce a spot of light off a (distant) object and measure the time it takes to bounce back. Knowing the speed of light, the distance is Time times Speed.
Who try to measure the speed of light?
Roemer was the first to measure the speed of light.
Does the speed of light ever slow down?
The speed of light is different in different substances ... air, water, glass, jello, etc.
Does color of a laser affects the velocity of the light wave projected by a laser?
No. Light travels at the same speed no matter what.
What is the speed of the laser beam in miles per second?
The same as the speed of light
How a laser can measure the distance?
To put it simply, a laser distance measuring device consists of 2 basic parts; an (laser) emitter and a receiver. The emitter part knows when it is transmitting pulses of laser light and is synchronized with the receiver. The laser light beam is travelling at the speed of light, so the distance travelled is calculated based on the AMOUNT TIME IT TAKES TO REACH THE RECEIVER, that its round trip time divided by 2.
How does the speed of light change when it enters the water?
That would depend what it enters from. If the light is transitioning from air to water,its speed decreases. If it's going from jello to water, its speed increases.
How can the speed of light and a laser beam be used to measure the distance between two satellites?
As the speed of light is thought to be an absolute speed (it is not, but close enough) we use it and a time frame, usually a year, to describe how far things are away. The term is : Light Year ( the distance light will travel in a year ) roughly 6 trillion miles For instance the closest star is thought to be four light years away.
How fast does light travel through jello?
For this to work you would need a cuboid shaped block of jello, with as flat a surface as possible and no impurities within it.Using a light source with a very narrow beam, (Ray box or preferably a Laser pointer, i suppose you would need one of a color that would show up in the jello) shine it at an angle from the normal (a line perpendicular to the plane the light is shining on) and measuring the angle of the incident beam (i) and then the angle of the beam as it has been refracted within it (r).Then calculate: sin i/sin r this will give you the refractive index.The speed of light within Jello= (1/refractive index of jello)x c (speed of light)
What happens to speed of light when light goes into air?
That depends what it comes out of. If it passes into air from vacuum, thenits speed decreases. If it passes into air from water or jello, then its speedincreases.
