10 Questions
What is the sign convention for the focal length of a concave lens?
Negative
Which formula expresses the relationship between object distance (u), image distance (v), and focal length (f) for lenses?
$\frac{1}{v} + \frac{1}{u} = \frac{1}{f}$
When solving problems relating to lenses using the lens formula, what should one take proper care of?
Signs of different quantities
In a concave lens, the nature of the image formed is usually:
Virtual and erect
For a concave lens, if an object is placed at a distance greater than twice the focal length, the image formed is usually:
Virtual and diminished
If the object distance 'u' in a lens formula problem is negative, it indicates that the object is located:
In front of the lens
The magnification produced by a concave lens for an object placed at infinity will be close to:
-1
In a lens formula problem, if the image distance 'v' is negative, it indicates that the image is formed:
On the same side as the object
'h < h''', object height < image height' refers to which type of image formation in lenses?
Real and diminished
What does a positive magnification value indicate about an image formed by a lens?
The image is larger than the object
This quiz covers observing and noting down the nature, relative size, and position of an image formed by a lens when a candle is placed at various distances. It also explores how the size of the image changes as the candle is moved away from the lens.
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