Question

Speed of light in vacuum is ----- m/s.

Answer 1

The speed of the light is constant and is denoted using notation C. The term Vacuum means a medium which is completely empty i.e. nothing is present in it. Light travels with maximum speed in vacuum so our required answer will be the maximum speed of the light.

Complete step by step solution:
The speed of light is maximum in the vacuum and it is denoted by C.
The maximum speed of the light in S.I unit is,
$C = 3 \times {10^8}m/s$

Therefore the answer is $3 \times {10^8}m/s$.

Additional information:
In order to understand light is one, we must realize that what we call light is simply what we see or what is apparent to us.

The light that can be seen by humans is called visible light scientists have found that multiple forms of the light that are not visible to humans can be seen by other species.

We were taught when we were studying in primary school that light is a ray and it moves and bounce off the surface in a straight line.

But we tend to know it later that light is a wave. It behaves exactly like the waves created when we throw a stone on the water’s surface.

Now we know that light is a stream of the particles. The particles are also known as the photons.

So we should have the question that what is the real answer that the light is the wave or particle.

The real reason then is that we have no idea what is light , no one knows what light really is so we are setting up a map of what light could be and if that’s how we picture light then we can make better predictions .

Note:
As an approach to solve this question we discovered that in the vacuum speed of the light is maximum which is $3 \times {10^8}m/s$ in S.I unit and it is denoted by C and then we discovered that what the light is.