Advertisements
Advertisements
Question
The following diagram shows the object O and the image I formed by a lens. Copy the diagram and on it mark the positions of the lens LL’ and focus (F). Name the lens.
Advertisements
Solution
The complete diagram is shown in the figure in which the position of the lens has been marked by the letter LL’ and the focus as F. The lens is convex (or converging).
RELATED QUESTIONS
A doctor has prescribed a corrective lens of power +1.5 D. Find the focal length of the lens. Is the prescribed lens diverging or converging?
Which type of lens has (a) a positive power, and (b) a negative power?
How is the power of a lens related to its focal length?
The optician's prescription for a spectacle lens is marked +0.5 D. What is the:
(a) nature of spectacle lens?
(b) focal length of spectacle lens?
Fill in the following blank with suitable word:
For converging lenses, the power is __________ while for diverging lenses, the power is ___________.
How is the sign (+ or -) of power of a lens related to its divergent or convergent action?
A pin of length 2.00 cm is placed perpendicular to the principal axis of a converging lens. An inverted image of size 1.00 cm is formed at a distance of 40.0 cm from the pin. Find the focal length of the lens and its distance from the pin.
A convex lens is of focal length 20 cm. Find its power.
The power of lens depends on the focal length of the lens
A point object is placed at O in front of a glass sphere as shown in figure.
Show the formation of the image by the sphere.
