PhysicsLAB Worksheet
Refraction Through a Glass Plate

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Light of wavelength 650 nm strikes a rectangular glass plate as shown in the diagram below.
 
On your printouts, construct a normal and use a protractor to measure the ray's angle of incidence to one decimal place. 

Continue taking data by measuring the ray's angle of refraction inside the glass plate to one decimal place. 

If the index of refraction for air is n = 1.00, use Snell's Law to calculate the index of refraction of the glass plate to two decimal places. 

Using your value for the index of refraction of glass from the previous question, calculate the average speed at which this beam of light travels through the glass plate. 

Measure the distance (to one decimal place) that the light beam will need to travel as it moves through the plate. 

How many seconds does the light require to make the journey through the plate? 

Using your value for the index of refraction of glass, calculate the wavelength of this beam of light as it passes through the glass plate. 

What is the frequency of this beam of light? 

On your printout sketch the path of the ray once it exits the glass plate. Justify the angle you chose for this exiting ray. 




 
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