The speed of light in vacuum depends on,

1)wavelength
2)frequency
3)intensity
4)temperature
5)none of the above

I know that 1 and 2 are correct. What about the others?

Huh ?

Please Google speed of light in a vacuum.

typo: * 1 and 2 are incorrect

Actually I was expecting a simpler explanation than what I've found on them already. :-)

Well the speed of light changes when passing through material, like air or water or glass, but not in a vacuum. What does temperature mean in a vacuum?

Something really, really massive nearby can have an effect (Einstein, relativity, gravitational lens)

The correct answer is 5) none of the above.

The speed of light in a vacuum is a fundamental constant of nature and is not dependent on any of the factors listed.

Let's break down the other options to understand why they are not correct:

1) Wavelength: While the speed of light is related to the wavelength of light, the speed itself is not dependent on the wavelength.

2) Frequency: The speed of light is inversely proportional to the frequency of light, meaning as the frequency increases, the speed of light remains constant. However, the frequency itself does not determine the actual speed of light.

3) Intensity: Intensity refers to the amount of light energy per unit area, and it does not affect the speed of light. The speed of light remains the same regardless of whether the light is intense or not.

4) Temperature: The speed of light is not affected by temperature. It remains constant regardless of the temperature of the medium through which light is passing.

So, in summary, none of the options provided - wavelength, frequency, intensity, or temperature - affect the speed of light in a vacuum.