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प्रश्न
Which type of lenses are:
thicker in the middle than at the edges?
उत्तर
A convex lens is thicker in the middle than at the edges.
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संबंधित प्रश्न
An object of height 2.5 cm is placed at a distance of 15 cm from the optical centre 'O' of a convex lens of focal length 10 cm. Draw a ray diagram to find the position and size of the image formed. Mark optical 'O', principal focus F and height of the image on the diagram.
An object of height 4.0 cm is placed at a distance of 30 cm from the optical centre 'O' of a convex lens of focal length 20 cm. Draw a ray diagram to find the position and size of the image formed. Mark optical centre 'O' and principal focus 'F' on the diagram. Also find the approximate ratio of size of the image to the size of the object.
Distinguish between a convex lens and concave lens. Which of the two is a converging lens : convex lens of concave lens?
A convex lens has a divergent action and a concave lens has a convergent action.
If you are to determine to focal length of a convex lens, you should have
(A) a convex lens and a screen
(B) a convex lens and a lens holder
(C) a lens holder, a screen holder and a scale
(D) a convex lens, a screen, holder for them and a scale
A pin 2 cm long is placed 12 cm away from a convex lens at right angles to the principal axis. If the focal length of the lens is 20 cm, by scale drawing find the size of the image and its magnification.
State the position of object, position of image, nature of image when: Convex lens is used in observing biological specimens.
How will you determine the focal length of a convex lens by the plane mirror method?
Convex lens is also known as ______.
Distinguish between:
Concave lens and Convex Lens
