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प्रश्न
What is power of accommodation of eye?
उत्तर
The ability of the eye lens to focus nearby as well as distant objects are called the power of accommodation of the eye.
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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.
You have two lenses A and B of focal lengths +10 cm and –10 cm, respectively. State the nature and power of each lens. Which of the two lenses will form a virtual and magnified image of an object placed 8 cm from the lens? Draw a ray diagram to justify your answer
Ranbir claims to have obtained an image twice the size of the object with a concave lens. Is he correct? Give a reason for your answer.
Consider two statements A and B given below:
A: real image is always inverted
B: virtual image is always erect
Out of these two statements:
The power of a lens is + 0.2 D. Calculate its focal length.
An object of height 4.25 mm is placed at a distance of 10 cm from a convex lens of power +5D. Find (i) the focal length of the lens, and (ii) the size of the image.
How does focal length of a lens change when red light incident on it is replaced by violet light? Give reason for your answer.
A screen is placed a distance 40 cm away from an illuminated object. A converging lens is placed between the source and the screen and its is attempted to form the image of the source on the screen. If no position could be found, the focal length of the lens
The power of the magnifying glass depends on the distance of the magnifying glass from object.
Find the power of a convex lens of focal length of + 25 cm.
