The common value for “Speed of light in vacuum” is [tex] \bold{3 \times 10^{8}} [/tex] metre per second.
Answer: Option b
Solution:
Speed of light can be defined as the speed with which light waves propagate in different medium. In vacuum, speed of light is 186,282 miles per second or 299,792 km/s which is rounded off as [tex]3 \times 10^{8} \mathrm{m} / \mathrm{s}[/tex].
“Speed of light in vacuum” is a universal constant and usually represented by ‘c’. Light waves travels at a speed of [tex]3 \times 10^{8}[/tex] metre per second in vacuum.
