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Which of these is a non-optical aid for ...

Which of these is a non-optical aid for visually challenged individuals?

A

Bifocal lenses

B

Contact lenses

C

Telescopic aid

D

Audio books

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The correct Answer is:
D
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PEARSON IIT JEE FOUNDATION-LIGHT-CLASSROOM CORNER (A. Very Short Answer Type Questions) (Multiple Choice Questions)
  1. Surfaces which cause diffuse reflection

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  2. Angle of reflection is

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  3. Which of these is a non-optical aid for visually challenged individual...

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  4. Angle of incidence is equal to the angle of reflection.

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  5. Image formed by a plane mirror is

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  6. Objects which do not produce any light of their own are called obje...

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  7. An image formed due to the actual joining of light rays at some point ...

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  8. A hypothetical line which is drawn perpendicular to an opaque surface,...

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  9. The property of the image formed by a plane mirror, due to which the ...

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  10. A is an instrument that is based on the principle of multiple reflect...

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  11. The white outer wall of the eye is called

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  12. The iris controls the amount of light entering the eye by contracting ...

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  13. Rods are sensitive to light , while cones are sensitive to light.

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  14. Braille system is a type of aid because it uses the sense of touch.

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  15. The sun is seen even after the actual sunset because of

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  16. Long-sightedness is caused due to

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  17. If an object is placed at the principal focus of a convex lens, the im...

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  18. Just before the time of sunset the sun appears to be bigger because

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  19. Myopia is caused due to

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  20. What are the laws of reflection? (i) The angle of incidence is equal...

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