A) 45cm
B) 40cm
C) 30cm
D) 20cm
Correct Answer: D
Solution :
Speed of light in glass \[v=\frac{c}{\mu }\] So, distance travelled \[d={{c}_{g}}.t\] \[=\frac{c}{\mu }.t\] \[=\frac{3\times {{10}^{8}}}{1.5}\times 1\times {{10}^{-9}}\] \[=0.2m\] \[=20cm\]
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