what is the speed of light? (this is from my little sister)

Question: what is the speed of light? (this is from my little sister)
- Keywords:
  space,
  speed of light
Asked by game45day to Souvik, Sabine, Armin on 22 Nov 2019.
- Armin Shams answered on 22 Nov 2019:
  
  Nearly 300 000 KM per second
- Souvik Kundu answered on 22 Nov 2019:
  
  Speed of light in vacuum and air are almost 300,000 km/s but it varies from media to media, depends upon refractive index of that …