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प्रश्न
Assertion and reasoning type
- Assertion: Myopia is due to the increase in the converging power of eye lens.
- Reason: Myopia can be corrected with the help of concave lens.
पर्याय
If both assertion and reason are true and the reason is the correct explanation of assertion.
If both assertion and reason are true but reason is not the correct explanation of assertion.
Assertion is true but reason is false.
Assertion is false but reason is true.
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उत्तर
If both assertion and reason are true but reason is not the correct explanation of assertion.
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संबंधित प्रश्न
What is meant by a power of a lens? Define its SI unit.
A convex lens forms a real and inverted image of a needle at a distance of 50 cm from it. Where is the needle placed in front of the convex lens if the image is equal to the size of the object? Also, find the power of the lens.
Find the power of a concave lens of focal length 2m.
What is the focal length of a convex lens of focal length 30 cm in contact with a concave lens of focal length 20 cm? Is the system a converging or a diverging lens? Ignore thickness of the lenses.
The power of a lens is + 0.2 D. Calculate its focal length.
What is the nature of a lens whose power is, −4 D?
A lens has a focal length of, −10 cm. What is the power of the lens and what is its nature?
The focal length of a lens is +150 mm. What kind of lens is it and what is its power?
How does focal length of a lens change when red light incident on it is replaced by violet light? Give reason for your answer.
Which lens has more power a thick lens or a thin lens?
