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प्रश्न
The power of lens depends on the focal length of the lens
पर्याय
True
False
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उत्तर
True
APPEARS IN
संबंधित प्रश्न
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.
The lens mentioned in 6(b) above is of focal length 25cm. Calculate the power of the lens.
Fill in the following blank with suitable word:
For converging lenses, the power is __________ while for diverging lenses, the power is ___________.
State the condition for the following a ray passes undeviated through the lens .
How is the power of a lens related to its focal length?
How does the power of a lens change if its focal length is doubled?
How is the sign (+ or -) of power of a lens related to its divergent or convergent action?
Name the type of lens whose power is positive.
The image of an object formed by a lens is real, inverted and of the same size as the object. If the image is at a distance of 40 cm from the lens, what is the nature and power of the lens ? Draw ray diagram to justify your answer.
Consider the situation described in the previous problem. Where should a point source be placed on the principal axis so that the two images form at the same place?
A lens forms an upright and diminished image of an object, irrespective of its position. What kind of lens is this? Draw an outline ray diagram to show the formation of the image. State the position and one more characteristic of the image.
