Question

Calculate the time taken by the light to pass through a nucleus of diameter$1.3\times {10}^{-15}m$, if the speed of light is $3\times {10}^{8}m/s$.

• A. $5.2\times {10}^{-25}s$
• B. $4.3\times {10}^{-24}s$
• C. $5.2\times {10}^{-24}s$
• D. $4.3\times {10}^{-25}s$

Answer 1

The correct option is B $4.3\times {10}^{-24}s$

$\mathrm{Time}=\frac{\mathrm{Distance}}{\mathrm{Speed}\mathrm{of}\mathrm{light}}=\frac{1.3\times {10}^{-15}}{3\times {10}^8}\Rightarrow \; Time\; =4.33\times {10}^{-24}s$