7. Lenses : Odd One Out

Find the odd one out and give explanation

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5 Marks

Answer: Size of the Image
Size of the Image is measured along the Y-axis while all the others are measured along the X-axis.

Answer: Prism
All the others are optical instruments used for getting a magnified image of the object.

Answer: Cerebellum
Cerebellum is a part of the human brain while all the others are the parts of the human eye.

Answer: Principal axis
Principal axis is an imaginary line. All others are physical quantities related to mirrors/lenses.

Answer: Kaleidoscope
Kaleidoscope uses mirrors while all the others use lenses.

Focal length, Radius of curvature, Image distance, Size of the Image