Question

Wavelength of light in vacuum is 5890 $\mathring{A}$ then its wavelength in glass ($\mu =1.5$) will be

• A. $9372\mathring{A}$
• B. $7932\mathring{A}$
• C. $7548\mathring{A}$
• D. $3927\mathring{A}$

Answer 1

Answer: (D)

Given, wavelength in vacuum $=5890\mathring{A}$
In a medium of refractive index, the wavelength of light decreases to $\frac{\lambda }{\mu }=\frac{5890}{1.5}=3927\mathring{A}$