Question

How long does it take light to travel through a 2.0- mm -thick piece of window glass?

Answer 1

Light travels at the exact speed of 299,792,458 meters (983,571,056 feet) per second in a vacuum.

The light passes through a 2.0-mm-thick section of window glass

= 1 × $10^{-14}$    sec

                             

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Speed is defined as the rate at which an object's position changes in any direction. Speed is calculated as the ratio of distance traveled to time spent traveling. Speed is a scalar quantity because it has a direction but no magnitude. The SI unit of speed is milliseconds per second.

There are several types of speeds:

• Consistent speed
• Speed control
• Speed in an instant
• The average speed
• Speed Relative

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Hence,

A thick piece of window glass = 2 mm

speed of light in medium = speed of light in vacuum / refractive index

      = (3×$10^{8}$)/1.5  

       = 2 ×$10^{8}$ m/s                                           

Time = distance / speed  

      = (2 × $10^{-3}$ )/(2 × $10^{-11}$)

      = 1 × $10^{-14}$    sec

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brainly.com/question/13263542

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