Advertisements
Advertisements
प्रश्न
An object is placed in front of a lens between its optical centre and focus. The formed image is virtual, erect, and diminished. Name the lens used.
उत्तर
The lens used is a concave lens.
APPEARS IN
संबंधित प्रश्न
Explain with the help of a diagram, why the concave lens is also called a diverging lens.
An object lies at a distance of 2f from a concave lens of focal length f. Draw a ray-diagram to illustrate the image formation.
Name one of the common defects of vision and the type of lens used to remove it.
What kind of lens is used to correct
short-sightedness
A concave lens forms the image of an object which is ______.
How will you differentiate between a convex and a concave lens by looking at
- a distant object,
- a printed page?
A virtual diminished image is formed when an object is placed between the optical centre and the principal focus of a lens.
(i) Name the type of lens which forms the above image.
(ii) Draw a ray diagram to show the formation of the image with the above stated characteristics.
When an object is kept within the focus of a concave mirror, an enlarged image is formed behind the mirror. This image is :
Copy the following figure and complete it to show the formation of the image of the object AB. Name the lens used in the figure.
The focal length of a lens is negative. In this case, state the kind of lens.
