Answer:
QUESTION①)
✔First you have to calculate the light's speed in the glass,
You know that in the air and in the void (where the refraction index n is zero) the light's speed C corresponds to 3,0 x 10^8 m/s
So We have :
V = C/n
- V = 3,0 x 10^8/1,56
- V ≈ 1,92 x 10^8 m/s
✔ Now, you know the light's speed in glass, and you know that : the wavelength λ is the quotient of light's speed V on its frequency ν, so :
λ = V/ ν
- λ = 1,82 x 10^8/5,70 x 10^14
- λ ≈ 3.40 x 10^-7 m
- λ ≈ 340 nm
