Question

Surabhi from std 10 uses spectacle. The power of lenses in her spectacle is 0.5D answer the question
1. identify the type of lenses used in her spectacle
2.identify the defect of vision Surabhi is suffering from.
3.find the focal length of lenses used in her spectacles.
plzz answer rapidly
Iwill mark u brainlist​

Answer 1

Answer:

it is a convex lens.

surbhi is not able to see nearby objects clearly. she is suffering from presbyopia. (not sure)

p=1/f.

0.5=1/f.

=2.

Answer 2

Thus the focal length of the lens is 2 cm

Explanation:

• It is a convex lens. Convex lens is used to magnify to magnify the objects. It is also used in cameras for focusing the images.
• Surabhi is not able to see nearby objects clearly. she is suffering from myopia. As she is not able to see the distant objects clearly.
• The focal length can be found by using the power lens formula.

Power "P" = 1/f

0.5 = 1/f

f = 2

Thus the focal length of the lens is 2 cm