The colour of light that deviates least in a glass prism is
A. Blue
B. Green
C. Violet
D. Red
Answer: Option D
Solution (By JKSSB Mock Tests)
Dispersion: red has longest wavelength, lowest refractive index, deviates least. Violet deviates most. So spectrum: red at top (least deviation), violet at bottom.
Explanation:
Telescope (refracting/reflecting) makes distant objects appear nearer, magnified. Microscope for tiny near objects. Periscope uses mirrors to see over obstacles. Endoscope medical.
Explanation:
Fuse wire made of alloy of tin and lead (or copper with low melting point). It has low melting point and high resistance. Copper has high melting point, not suitable for fuse. Silver expensive. Aluminium not typical.
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