Answer:
The value is [tex]n = 1.081[/tex]
Explanation:
From the question we are told that
The speed of in a vacuum is [tex]c = 3.0 *10^{8} \ m/s[/tex]
The speed of light in the material is [tex]v = c -0.075c = 0.925 c = 0.925 * 3.0*10^{8} = 2.775 *10^{8} \ m/s[/tex]
Generally the reflection of the material is mathematically represented as
[tex]n = \frac{c}{v}[/tex]
=> [tex]n = \frac{3.0*10^{8}}{2.775 *10^{8}}[/tex]
=> [tex]n = 1.081[/tex]
