The Wave Front Shown at the Left for Light in Air

question 22

Multiple Choice

The wave front shown at the left for light in air reaches the plane boundary between air and two transparent mediums with n₁ = 1.5 and n₂ = 3.00, respectively. ​ ​
Which diagram below correctly illustrates the wave front after it has entered the two mediums at the right?
​ ​

• A)A
• B)B
• C)C
• D)D

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