Q.61)-The part of the eye having largest refractive index is
- Cornea
- Aqueous humor
- Lens
- Virtuous humor
Q.62)-Hypermetropia or long sightedness can be corrected by using
- Bifocal lenses
- Cylindrical lenses
- Concave lenses
- Convex lenses
Q.63)-The final image in a simple microscope is
- Real, diminished and inverted
- Real,magnified and erect
- Virtual, magnified and erect
- Virtual, diminished and erect
Q.64)-Is dangerous to observe solar eclipse with naked eyes because
- Infrared radiations from sun burn our retina
- Ultraviolet radiations from sun burn our retina
- All radiations from sun initiate chemical reactions in eyes
- Cosmic rays reach eyes more during the eclipse
Q.65)-Short-sight in human eye can be corrected by using proper
- Convex lens
- Concave lens
- Cylindrical lens
- Bifocal lens
Q.66)-Myopia is the same as
- Near sightedness
- Astigmatism
- Presbyopia
- Long sightedness
Q.67)-The owl can see most clearly in total darkness because
- It has squint eyes
- It has large eyes with rods directed forward, giving it binocular sight
- It has light bulbs in its eyes provided by nature
- It produces infrasonic sounds
Q.68)-What is myopia?
- Inability to see distant objects clearly
- Abnormal functioning of the thyroid gland
- It is a condition of enlargement of heart
- It is kidney disorder
Q.69)-The sky appears to an astronaut
- White
- Bark blue
- Light green
- Black
Q.70)-Colour blindness defect can be corrected by using the lens
- Concave lens
- Convex lens
- Cylindrical lens
- None of these
