Speed of Light

Diffraction is the spreading of waves that pass through a narrow opening or move past an obstacle ,whereas, interference is the phenomenon of redistribution of light in a medium as a result of light waves from two coherent sources.

Yes, natural sources of laser light have been observed in certain animals, such as the spitting cobra, which can emit laser-like beams of red or green light from its eyes. These animals use this light for communication or hunting purposes.

The speed of light is constant and does not directly affect the length of the day. The length of a day is determined by the time it takes for the Earth to complete one full rotation on its axis, which is approximately 24 hours. This rotation period is independent of the speed of light.

To travel at the speed of light, you would need to have an infinite amount of energy, which is currently not possible with our current technology and understanding of physics. Additionally, as per the theory of relativity, an object with mass cannot reach the speed of light.

To find the wavelength of light in Plexiglass, you need to take into account the change in speed of light. Since light travels at 67% of its speed in air in Plexiglass, you would need to calculate the wavelength using the formula: wavelength in Plexiglass = wavelength in air / refractive index of Plexiglass. Refractive index of Plexiglass is calculated as speed of light in air / speed of light in Plexiglass.

Sound . . . 0.34 km/second

Light . . . . 300,000 km/second

When light enters another medium it changes speed, but thewavelength changes correspondingly so that the frequency does not change. For example, if light enters a medium where its speed is cut in half, then the wavelength will also be reduced by half.

1 byte = 8 bits

7 mega bits per second = 7/8 mega byte per second

1.5 mega byte per second = 12 mega bits per second

The speed of light is 299,792,458 meters per second .

The magnitude of the square root of that quantity is roughly 17,314.5 ,
and its unit is [ square root of (meter / second) ] .

The square root of a speed has no physical significance or meaning.

The theory that nothing can travel faster than the speed of light in a vacuum was first proposed by the famous physicist Albert Einstein in his Theory of Relativity in 1905. The concept of the speed of light being constant and a universal speed limit has since been confirmed through various experiments and observations.

The only speed it has is 299,792,458 meters (186,282.397 miles) per second,

in vacuum.

Nothing happens to light waves at all. UNLESS the two materials happen

to be right next to each other AND the light tries to cross FROM one INTO

the other one. Then things get very interesting.

1 watt is a unit of power that represents the rate at which work is done or energy is consumed. It is equivalent to one joule of energy per second. It is commonly used to measure the power output of electrical devices.

Comparitively weak ... but only 'comparitively'.

Laser pointers are Class IIIa lasers. Their output power is limited to

5 milliwatts, with a beam power density that can't exceed 2.5 mW/cm2

without a "danger" warning label.

Pointers are powered by 'button' batteries that last a long time in laser-pointer

service. Still, they're capable of causing eye damage if shined directly into an

eye for more than a minute.

Lightning can hit the Earth, or in some cases COME from the Earth and go up depending on local electric gradients. The flow of electrical charge causes light, but the speed of that flow is MUCH less than the speed of light. In comparable media, NOTHING can exceed [or even equal] the speed of light, as described in the Special Theory of Relativity. A mass will grow to enormous, mind boggling values as it approaches the speed of light, because of a term in the equation (1 - v/c) in the denominator which makes the value approach infinity as v/c approaches 1, so 1-1 = 0 and you approach dividing by zero. v takes values starting from zero almost up to c, the speed of light in a vacuum.

The speed of light was predicted before it was ever measured. If you write the

differential equation of a wave, there's a very definite place in the equation where

the speed of the wave appears.

The Scottish Physicist James Clerk-Maxwell took four equations of electricity and

magnetism that had been discovered by earlier scientists, and succeeded in

mashing them together to come up with the equation of an electromagnetic wave.

Right there in the spot where the wave speed should be was the quantity

[ (electrostatic permittivity of space) x (magnetic permeability of space) ] .

Both of those properties of space had been kind-of measured by Maxwell's time,

but now it suddenly became very urgent to go back and work on measuring them

with the utmost accuracy ... and at the same time, to figure out a way to measure

the speed of light. Because if that quantity could be shown to match the real speed

of light, then we would know that light is an electromagnetic wave, and that Maxwell's equation for it is an accurate mathematical description of it.

You asked "Why is that the speed of light ?" The answer is: Because light is an

electromagnetic wave, therefore its speed is determined by those two properties

of free space, and the values of those two properties of space happen to be

such and such."

Now, we can almost hear you asking "Why are the values of those two characteristics

of space the numbers that they are, and not a bit more or less ?"

All we can tell you is that there are cosmologists who are actually working on that

esoteric question, along with the question of why other properties of the universe (For example, the gravitational constant.) are the numbers that they are. One realization that has emerged is the fact that if a few of the constant numbers of nature were just slightly different from what they actually are, then life would not be possible.

Yes, light is always slowed down when it goes through a medium. All media have an empirical index of refraction which is essentially how much they slow light. A vacuum like space has an index of refraction of 1, which means that light is going it's normal (fastest) speed. Water has an index of refraction of 1.333 so it slows light about 25%. Air is slightly above 1 but less than water.

Light is slowed because its electromagnetic field interacts with that of the atoms and electrons it is passing by.

Light travels at about 670 million miles per hour.

As the wavelength increases to infinity the electro-magnetic continuum take on a new base value and with no variation has no radiation to transmit.

As the wavelength decreases to zero the energy packet become a massive body and therefore is no longer a radiating.

-- Light approaches the boundary between any two media along the normal direction.

-- Light approaches the boundary at any angle and the indexes of refraction

of both media are equal.

Light is an electromagnetic wave. it is under the spectrum of electromagnetic waves of range 400nm-750nm. below 400nm are IR radio waves etc. and above 750 are like Gamma Xray etc.

Every wavelength has different property and "energy". it effects differently on different type of chemicals , metals etc. So, different colors means different wavelengths and energy. and hence they have different effects.

The angle of incidence affects the degree of bending of light in a semicircular prism by determining the angle of refraction as the light enters and exits the prism. A larger angle of incidence will result in a greater angle of refraction, causing the light to bend more as it passes through the prism. The relationship between the angle of incidence and the angle of refraction is determined by Snell's Law.

LEDs can emit light in different color spectra based on the materials used in the construction of the LED. Common colors include red (630-700nm), green (510-550nm), blue (450-495nm), and white (mix of different colors). Other colors like yellow, orange, and ultraviolet can also be produced by LEDs.

If light moves from a material with a lower speed to one with a higher speed, it undergoes refraction. This causes the light ray to bend away from the normal line, which is an imaginary line perpendicular to the surface of the material at the point where the light enters or exits. The angle of refraction is dependent on the difference in speed between the two materials.