Formula deep page
Speed and Refractive Index
n = c/v (refractive index = speed in vacuum / speed in medium)
This formula belongs to the chapter "Light" in Class 8 Science. Use it after identifying the right variables, matching the chapter context, and writing the substitution clearly.
How to use it
- Identify the quantity you need to find.
- Check the related variables and units from the question.
- Substitute values carefully into the formula.
- Simplify step by step and write the final statement.
Worked cue
Glass n≈1.5: light slows to c/1.5 = 2×10⁸ m/s