Question
Download Solution PDFWhich one among the. following figures correctly represents the ray diagram ? (Consider the lens to be thin)
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFCONCEPT:
Ray Diagrams for Lenses
- A ray diagram shows the path of light rays as they pass through a lens.
- There are three primary rays used to construct a ray diagram for a thin lens:
- Ray parallel to the principal axis: This ray refracts through the lens and passes through (or appears to pass through) the focal point on the opposite side.
- Ray through the center of the lens: This ray passes straight through the lens without changing direction.
- Ray through the focal point: This ray refracts through the lens and travels parallel to the principal axis.
EXPLANATION:
- For a convex lens:
- A ray parallel to the principal axis refracts and passes through the focal point on the other side.
- A ray passing through the center of the lens does not change direction.
- A ray passing through the focal point refracts and travels parallel to the principal axis.
Therefore, the correct figure representing the ray diagram is Option 3.
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