When white light consisting of wavelengths ranging from 400 nm to 700 nm passes through water (μ = 4/3), then the wavelength range in water will be:
Answer & explanation
Correct answer: option 1
The correct answer is Option (1) → 300 nm - 525 nm
Wavelength in a medium: $\lambda_\text{medium} = \frac{\lambda_\text{vacuum}}{\mu}$
Given $\mu = \frac{4}{3}$, white light range: 400 nm to 700 nm
In water:
Minimum wavelength: $\lambda_\text{min} = \frac{400}{4/3} = 300\ \text{nm}$
Maximum wavelength: $\lambda_\text{max} = \frac{700}{4/3} = 525\ \text{nm}$
Final Answer: Wavelength range in water = 300 nm to 525 nm