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प्रश्न
A concave lens forms a magnified or diminished image depending on the distance of an object from it.
विकल्प
True
False
उत्तर
This statement is false.
APPEARS IN
संबंधित प्रश्न
Where must the object be placed for the image formed by a converging lens to be:
real, inverted and same size as the object?
If the image formed by a lens is always diminished and erect, what is the nature of the lens?
How would a pencil look like if you saw it through
a concave lens Is the image real or virtual?
State one practical use each of convex mirror, concave mirror, convex lens and concave lens.
When an object is kept at any distance in front of a concave lens, the image formed is always:
(a) virtual, erect and magnified
(b) virtual, inverted and diminished.
(c) virtual, erect and diminished
(d) virtual, erect and same size as object
When an object is placed 10 cm in front of lens A, the image is real, inverted, magnified and formed at a great distance. When the same object is placed 10 cm in front of lens B, the image formed is real, inverted and same size as the object.
What is the nature of lens B?
State whether the following statement is true or false:
Short-sightedness can be cured by using a concave lens.
A person cannot see distant objects clearly. His vision can be corrected by using the spectacles containing:
(a) concave lenses
(b) plane lenses
(c) contact lenses
(d) convex lenses
Explain the working of an astronomical telescope using refraction of light.
Express power of a concave lens of focal length 50 cm with its sign.
