It is denoted by a symbol called Lambda (λ). As per the given definition, we know that wavelength is the length thus the S.I unit of wavelength should be the same as the S.I unit of length. We know, the S.I unit of length is metre so the SI unit of wavelength is also metre.

In an equation, wavelength is represented by the Greek letter lambda (λ). Depending on the type of wave, wavelength can be measured in meters, centimeters, or nanometers (1 m = 109 nm). The frequency, represented by the Greek letter nu (ν), is the number of waves that pass a certain point in a specified amount of time.

The lowercase version of the Greek letter “lambda” (λ) is the standard symbol used to represent wavelength in physics and mathematics. The letter “v” represents velocity and “ƒ” represents frequency.

The symbol v is generally used for the frequency of electromagnetic waves; whereas, the symbol f is generally used for the frequency of ordinary waves that require a material medium, such as sound and water waves. The period of the wave is the time lapse between crests (or between troughs).

symbol f

frequency (units: 1 hertz = 1 hz = 1 cycle/sec = 1 sec )-1. c = speed of light = 3 x 10 m/sec.

c = the speed of light = 300,000 km/s or 3.0 x 108 m/s. = the wavelength of light, usually measured in meters or Ångströms (1 Å = 10-10 m) f = the frequency at which light waves pass by, measured in units of per seconds (1/s).

Lambda (uppercase/lowercase Λ λ) is a letter of the Greek alphabet. It is used to represent the “l” sound in Ancient and Modern Greek. In the system of Greek numerals, it has a value of 30.

The metre is the length of the path travelled by light in vacuum during a time interval of 1/299 792 458 of a second. This defines the speed of light in vacuum to be exactly 299,792,458 m/s. This provides a very short answer to the question “Is c constant”: Yes, c is constant by definition!

The theory of special relativity showed that particles of light, photons, travel through a vacuum at a constant pace of 670,616,629 miles per hour — a speed that’s immensely difficult to achieve and impossible to surpass in that environment.

The speed of light as it travels through air and space is much faster than that of sound; it travels at 300 million meters per second or 273,400 miles per hour. Visible light can also travel through other things besides through air and through space.

Darkness is simply the absence of light. Nothing more, nothing less. Therefore, it cannot be classified as an element or an elementary cause.

The simple answer is, “Yes, it is possible to stop time. All you need to do is travel at light speed.” Special Relativity pertains specifically to light. The fundamental tenet is that light speed is constant in all inertial reference frames, hence the denotation of “c” in reference to light.

As for backward time travel, it is possible to find solutions in general relativity that allow for it, such as a rotating black hole. Traveling to an arbitrary point in spacetime has very limited support in theoretical physics, and is usually connected only with quantum mechanics or wormholes.

Travelling in time might sound like a flight of fancy, but some physicists think it might really be possible. BBC Horizon looked at some of the most promising ideas for turning this staple of science fiction into reality.

According to Einstein’s general theory of relativity, as an object moves faster, its mass increases, while its length contracts. At the speed of light, such an object has an infinite mass, while its length is 0 — an impossibility. Thus, no object can reach the speed of light, the theory goes.

Light travels at an approximate speed of 3 x 105 kilometres every second, or 186,000 miles per second. It seems, so far, that no object has been observed that can travel faster than the speed of light. This in itself does not say anything at all about God.

So will it ever be possible for us to travel at light speed? Based on our current understanding of physics and the limits of the natural world, the answer, sadly, is no. So, light-speed travel and faster-than-light travel are physical impossibilities, especially for anything with mass, such as spacecraft and humans.

Yes, wind can travel faster than the speed of sound. The speed of sound is not a fundamental speed like the speed of light is. The speed of sound just describes how fast a mechanical wave travels through a material. Different materials have different speeds of sound.

The speed of sound through air is about 340 meters per second. It’s faster through water, and it’s even faster through steel. Light will travel through a vacuum at 300 million meters per second. If you have light that’s going through media, it can travel slower than that.

A Mach number is the ratio of an object’s speed in a given medium to the speed of sound in that medium. Mach 1, then, is the speed of sound, around 761 mph at sea level on a standard day. The term is also used as a metaphor for high speeds more generally.