Advertisements
Advertisements
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.
विकल्प
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.
Advertisements
उत्तर
If both assertion and reason are true but reason is not the correct explanation of assertion.
APPEARS IN
संबंधित प्रश्न
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.
A student uses a lens of focal length 40 cm and another of –20 cm. Write the nature and power of each lens
What is the power of a convex lens of focal length 0.5 m?
A converging lens has focal length of 50 mm. What is the power of the lens?
A combination of lenses for a camera contains two converging lenses of focal lengths 20 cm and 40 cm and a diverging lens of focal length 50 cm. Find the power and focal length of the combination.A optical instrument in which the above arrangement of convex lens is used is a convex lens used to burn paper by focusing sunlight.
Define the term focal length of a lens.
Express the power (with sign) of a concave lens of focal length 20 cm.
If the lens is of focal length 25 cm. Calculate the power of the lens.

The above lens has a focal length of 10 cm. The object of height 2 mm is placed at a distance of 5 cm from the pole. Find the height of the image.
When monochromatic red light is used instead of blue light in a convex lens, its focal length will ______.
