Advertisements
Advertisements
Question
Name the lens for which magnification can be 1. For what position of the object will the magnification be 1?
Advertisements
Solution
The lens for which magnification can be 1 is a convex lens. For this, the object must be at 2F (i.e.r at distance twice the focal length, in front of the lens).
RELATED QUESTIONS
The following diagram shows an object AB and a converging lens L with foci F1 and F2. Draw two rays from the object AB and complete the diagram to locate the position of the image CD. Also mark on the diagram the position of eye from where the image can be viewed.
The following diagram shows an object AB and a converging lens L with foci F1 and F2 State three characteristics of the image in relation to the object.
A lens forms an erect, magnified, and virtual image of an object. Where is the object placed in relation to the lens?
An illuminated object lies at a distance 1.0 m from a screen. A convex lens is used to form the image of the object on a screen placed at a distance of 75 cm from the lens. Find:
- the focal length of the lens, and
- the magnification.
An object is placed at a distance of 20 cm in front of a concave lens of focal length 20 cm. find: the magnification of image.
The magnification by a lens is -3. Name the lens and state how are u and v related?
What are conjugate foci?
How is the magnification (m) produced by a lens related to the object distance (u) and the image distance (v)?
What is a simple microscope or a magnifying glass? Draw a ray diagram to show its function.
What is a magnifying glass (or a simple microscope)? Draw a ray diagram to show how a convex lens may be used as a magnifying glass. Where should the object be placed? State three characteristics of the image formed.
