When Light Travelling in Air Passes into a Sheet of Glass,it

question 72

Multiple Choice

When light travelling in air passes into a sheet of glass,it is observed to change in wavelength to 58% of its wavelength in air.What is the speed of light in the glass?

• A) 5.2 \(\times\) 10⁸ m/s
• B) 1.7 \(\times\) 10⁸ m/s
• C) 3.0 \(\times\) 10⁸ m/s
• D) 2.3 \(\times\) 10⁸ m/s