★ Human Eye and Colourful World Quiz
A person cannot see distinctly objects kept beyond 2 m. This defect can be corrected by using a lens of power
A. 0.5 D
B. -0.5 D
C. 0.2 D
D. -0.2 D
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Fine particles scatter which light more?
A. red
B. yellow
C. blue
D. violet
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