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प्रश्न
When an object is kept within the focus of a concave mirror, an enlarged image is formed behind the mirror. This image is :
विकल्प
real
inverted
virtual and inverted
virtual and erect
उत्तर
When an object is kept within the focus of a concave mirror, an enlarged image is formed behind the mirror. This image is virtual and erect.
संबंधित प्रश्न
Construct ray diagrams to illustrate the formation of a virtual image using a diverging lens.
Only one of the following applies to a concave lens. This is:
(a) focal length is positive
(b) image distance can be positive or negative
(c) height of image can be positive or negative
(d) image distance is always negative
The power of a converging lens is 4.5 D and that of a diverging lens is 3 D. The power of this combination of lenses placed close together is :
(a) +1.5D
(b) +7.5D
(c) −7.5D
(d) −1.5D
What type of lens is used to correct
myopia?
What kind of lens is used to correct
short-sightedness
Out of the two lenses, one concave and the other convex, state which one will show the divergent action on a light beam. Draw diagrams to illustrate your answer.
The power of a lens is negative. State whether it is convex or concave.
A student obtained clear image of window grills on the screen. But the teacher told him to get the image of a tree far away, instead of window. To get a clear image, the lens must be ............................
State three characteristics of the image of an extended source, formed by a concave lens.
Identify the device used as a spherical mirror or lens in following case, when the image formed is virtual and erect in case.
Object is placed between infinity and device, image formed is diminished and between focus and optical centre on the same side as that of the object.
