Question : A person suffering from long-sightedness wears spectacles having:
Option 1: concave-convex lens
Option 2: lenses with negative
Option 3: concave lenses
Option 4: convex lenses
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Correct Answer: convex lenses
Solution : The correct option is convex lenses.
Long-sightedness prescription glasses include convex lenses, which fix the light entering the eye by slightly bending the light rays inward, ensuring they fall at the right point on the retina. The centre of a convex lens, also known as a converging lens, is thicker. Through a convex lens, light rays converge.
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Question : A rearview mirror for driving is:
Option 1: plain
Option 2: concave
Option 3: convex
Option 4: inverted
Question : The type of mirrors used in the headlamp of cars is:
Option 1: parabolic concave
Option 2: plane
Option 3: spherical convex
Option 4: cylindrical concave
Question : The type of mirror used in automobiles to see the traffic on the rear side is
Option 1: concave
Option 2: plano-Convex
Option 3: plane
Option 4: convex
Question : Which mirror is used by doctors for examining eyes, ears, nose, and throat?
Option 1: Concave mirror
Option 2: Convex mirror
Option 3: Normal mirror
Option 4: Plane mirror
Question : A person having blood type B could safely donate blood to persons with blood types
Option 1: A and O
Option 2: B and O
Option 3: A and AB
Option 4: B and AB
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