Subjective Type

A lens forms an erect, magnified and virtual image of an object. (a) Name the type of lens. (b) Where is the object placed in relation to the lens? (c) Draw a ray diagram to show the formation of image. (d) Name the device which uses this principle.

Solution

(a) Convex lens
(b) The object is placed between the lens and focus ($$F_{1}$$).
(c) The ray diagram is shown here.
(d) 'Magnifying glass' uses this principle.

SIMILAR QUESTIONS

Optics

Which one of the following materials cannot be used to make a lens?

Optics

The image formed by a lens is always virtual, erect and smaller in size for an object kept at different positions in front of it. Identify the nature of the lens.

Optics

Observe the figure given as Figure 15.1 carefully. The given figures show the path of light through lenses of two different types, represented by rectangular boxes A and B. What is the nature of lenses A and B?

Optics

It was observed that when the distance between an object and a lens decreases, the size of the image increases. What is the nature of this lens? If you keep on decreasing the distance between the object and the lens, will you still able to obtain the image on the screen? Explain.

Optics

The given below figure shows an object OA and its image IB formed by a lens. (a) Name the lens and show it in the diagram (b) Draw suitable rays to locate the lens and its focus (c) State three characteristics of the image.

Optics

An object is placed on the axis of a lens. An image is formed by refraction in the lens. For all positions of the object on the axis of the lens, the positions of the image are always between the lens and the object. (a) name the lens. (b) Draw a ray diagram to show it. (c) State three characteristics of the image.

Optics

A lens forms an inverted image of an object. (a) What kind of lens is this? (b) What is the nature of the image real or virtual?

Optics

You are provided with a printed piece of paper. Using this paper how will you differentiate between a convex lens and a concave lens?

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