The power of a lens used in the reading glasses of a person is +1.5D. Is the lens concave or conex?
Answers
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5
Similar type of question comes aging, here power(+1.5) is given and focal lenght is required so,
p = 1/f
1.5 = 1/f
f = 1/1.5
f = .67 cm
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2
The power of the lens used in reading glass is convex lens.
Explanation
- the power of the convex lens is always positive and the power of a concave lens is negative. This is used on the the focal point and the sign convention of the spherical lens.
- The reading glass is usually worn by a person when he reaches the old age and there is difficulty in viewing the object which are placed close to our eyes.
- This occurs due to the refraction of light behind the retina of the eye which is corrected by the convex lens.
To know more about spherical lens,
In a spherical mirror and spherical lens have each a focal length of ...
https://brainly.in/question/8907067
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