Answer :
The speed of light was calculated in vacuum by a Dannish Scientist Olaus Roemer to be 3×10⁸ m/sec. Or simply 3 lakh kilometres per second.
It is also denoted by c which is constant.
It is also denoted by c which is constant.
[tex]{\fbox{\huge\sf\purple{AnsWeR}}}[/tex]
The speed of light in vaccum is [tex]\sf{3×10^8 m/s} [/tex]
Explore more
A vacuum is a volume that encloses little or no matter. In other words, it is a region that has a gaseous pressure much lower than that of atmospheric pressure.
Intensity is the amount of energy a sound wave has per unit of time. Intensity is measured in decibels, represented by dB. Softest sound: 0 dB. Harmful to hearing ≥ 85 dB.
Intensity of sounds
Whisper- 20 dB
Rainfall- 50 dB
Talking normally - 60 dB
Busy city traffic -80 dB
Cheer of crowd at sporting event -90 dB
Headphones at high volume -105 dB
Rock concert - 120 dB