Advertisements
Advertisements
प्रश्न
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.
Advertisements
उत्तर
A concave (or diverging) lens forms an upright and diminished image of an object irrespective of its position.
The outline ray diagram showing the formation of the image is given in figure. For the object AB, the image is A’B’.
The image is formed between optical centre O and focus F, in front of the lens.
The image is virtual.
संबंधित प्रश्न
State power of a lens S.I. unit.
How is the power of a lens related to its focal length?
What do you understand by the power of a lens? Name one factor on which the power of a lens depends.
State the condition for the following a ray passes undeviated through the lens .
How does the power of a lens change if its focal length is doubled?
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.
Focal length : metre : : power of lens : _______
The power of lens depends on the focal length of the lens
Increase in the converging power of eye lens cause ‘hypermetropia'
In what unit is the power of a lens expressed?
