Question

A speed of light in glass in about 2x 10*8 m/s.
use the Formulae, time/Distance to
find the time (in hours) for a
pulse of light to travel 7200 km in glass​

Answer 1

Answer:

14400 x 10*8 metres

Step-by-step explanation:

7200=Time/2 x 10*8

Answer 2

Therefore time = 10⁻⁵ h.

Step-by-step explanation:

Given , a speed of light in glass about 2×10⁸ m/s.

2×10⁸ m/s = $\frac{2\times 10^8 \times 3600}{1000}$ km/h = 72 ×10⁷km/h

Here distance = 7200 Km

$Speed=\frac{Distance}{Time}$

$\Rightarrow Time =\frac{Distance}{Speed}$

$\Rightarrow Time =\frac{7200}{72 \times 10^7}$

$\Rightarrow Time =10^{-5}$

Therefore time = 10⁻⁵ h