When light traveling in straight lines passes through an object that is curved like a lens, the light is ________ at different a
ngles.
1 answer:
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Answer:
The focal length is 15.549 cm
The power of the lens is 0.0643 D
Solution:
As per the question:
The near point is 50.0 cm
Distance of the glasses from the eyeball, d = 2.00 cm
The near point of a normal human eye is 25 cm
Now,
The image distance, v' = 50.0 - 2.00 = 48.0 cm
The object distance, u' = 25.0 - 2.00 = 23.0 cm
Now, using the Lens maker formula to calculate the focal length:
f = 15.549 cm
Now, the power of the lens in diopters is given by:
Answer:
Electric force = .
Explanation:
Given:
Charge on one grain,
Charge on second grain,
Distance between the two grains is,
Electric force acting between two charges separated by a distance
is:
Where, is Coulomb's constant equal to
.
Now, plug in the given values and solve for .
Therefore, the electric force between them is .