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Question
A parallel beam of light strikes a piece of transparent glass having cross section as shown in the figure below. Correct shape of the emergent wavefront will be (figures are schematic and not drawn to scale)
A parallel beam of light strikes a piece of transparent glass having cross section as shown in the figure below. Correct shape of the emergent wavefront will be (figures are schematic and not drawn to scale)
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Solution
The correct option is C
The explanation for the correct option:
Diagram for refraction of light
As per the concept of Huygens’ principle.
The theory of wavefront says, “wave moves such that direction of propagation is perpendicular to the wavefront.”
And as we can see that light rays will travel more in the air than glass medium. And if the glass medium is more than wavefront will slack. So, the shape of the emergent wavefront will be
Hence, option C is correct.
The explanation for the correct option:
Diagram for refraction of light
As per the concept of Huygens’ principle.
The theory of wavefront says, “wave moves such that direction of propagation is perpendicular to the wavefront.”
And as we can see that light rays will travel more in the air than glass medium. And if the glass medium is more than wavefront will slack. So, the shape of the emergent wavefront will be
Hence, option C is correct.
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