To see on object placed at a distance of less than 25cm, the ciliary muscles have to make the focal length still smaller, which puts strain on the ciliary muscles and they cannot make the focal length so small. Hence it is not possible to see at distance lens then 25 cm.
To see on object placed at a distance of less than 25cm, the ciliary muscles have to make the focal length still smaller, which puts strain on the ciliary muscles and they cannot make the focal length so small. Hence it is not possible to see at distance lens then 25 cm.
Current is flowing clockwise through a circular loop. The direction of magnetic field around the conductor can be known by using the right hand thumb rule. As the figure shows, the magnetic field would be towards the plane of the paper when it is inside the loop. On the other hand, the magnetic fielRead more
Current is flowing clockwise through a circular loop. The direction of magnetic field around the conductor can be known by using the right hand thumb rule. As the figure shows, the magnetic field would be towards the plane of the paper when it is inside the loop. On the other hand, the magnetic field would be away from the paper when it is outside the loop.
Why is a normal eye not able to see clearly the objects placed closer than 25 cm?
To see on object placed at a distance of less than 25cm, the ciliary muscles have to make the focal length still smaller, which puts strain on the ciliary muscles and they cannot make the focal length so small. Hence it is not possible to see at distance lens then 25 cm.
To see on object placed at a distance of less than 25cm, the ciliary muscles have to make the focal length still smaller, which puts strain on the ciliary muscles and they cannot make the focal length so small. Hence it is not possible to see at distance lens then 25 cm.
See lessThe far point of a myopic person is 80 cm in front of the eye. What is the nature and power of the lens required to correct the problem?
Concave lens P=1/f=−100/80=−1.25D
Concave lens P=1/f=−100/80=−1.25D
See lessA person needs a lens of power –5.5 dioptres for correcting his distant vision. For correcting his near vision he needs a lens of power +1.5 dioptre. What is the focal length of the lens required for correcting
(i) f=1/P=−1/5.5=−0.1818m. f=−18.18cm. (ii) f=1/P=1/1.5=0.666m. f = 66.6cm.
(i) f=1/P=−1/5.5=−0.1818m.
f=−18.18cm.
(ii) f=1/P=1/1.5=0.666m.
See lessf = 66.6cm.
What is meant by power of accommodation of the eye?
The power of the eye by which it can see nearby objects as well as faraway objects by changing its focal length is called its power of accommodation.
The power of the eye by which it can see nearby objects as well as faraway objects by changing its focal length is called its power of accommodation.
See lessConsider a circular loop of wire lying in the plane of the table. Let the current pass through the loop clockwise. Apply the right-hand rule to find out the direction of the magnetic field inside and outside the loop.
Current is flowing clockwise through a circular loop. The direction of magnetic field around the conductor can be known by using the right hand thumb rule. As the figure shows, the magnetic field would be towards the plane of the paper when it is inside the loop. On the other hand, the magnetic fielRead more
Current is flowing clockwise through a circular loop. The direction of magnetic field around the conductor can be known by using the right hand thumb rule. As the figure shows, the magnetic field would be towards the plane of the paper when it is inside the loop. On the other hand, the magnetic field would be away from the paper when it is outside the loop.
See less