Explain with a ray diagram the position, size, and nature of the various images formed by a convex lens. An object at 2F1. - Science and Technology 1

Advertisements
Advertisements
Short Note

Explain with a ray diagram the position, size, and nature of the various images formed by a convex lens.

An object at 2F1.

Advertisements

Solution

Position of image: At 2F2

Size of the image: Same size

Nature of the image: Real and inverted

Concept: Lens
  Is there an error in this question or solution?
Chapter 7: Lenses - Answer the following questions

RELATED QUESTIONS

Show by a ray diagram that a diverging lens cannot form a real image of an object placed anywhere on its principal axis.


Match the columns in the following table and explain them.

Column 1 Column 2 Column 3
Farsightedness
Nearby object can be seen clearly
Bifocal lens
Presbyopia Far away object can be seen clearly Concave lens
Nearsightedness Problem of old age Convex lens

(i) If the lens is placed in water instead of air, how does its focal length change ? 
(ii) Which lens, thick or thin has greater focal length ?


The instrument used to observe planets.

Aniket from Std. X uses spectacles. The power of the lenses in his spectacles is - 0.5 dioptre.
Answer the following questions:
  1. State the type of lenses used in his spectacles.
  2. Name the defect of vision Aniket is suffering from.
  3. Find the focal length of the lenses used in his spectacles.

How are the distance of object (u), the distance of image (v), and focal length (f) of a lens-related?


State the nature and position of the object on the principal axis to obtain. A virtual and diminished image.


Draw a ray diagram to show the formation of an inverted and diminished image of an object by a lens. Name the lens used. State the position of the object with respect to the lens used. State one more characteristic of the image.


Write down the characteristic of the image formed when the object is between F and 2F?


Define the principal axis.


Define the optical centre of a lens.


Draw a ray diagram to illustrate the formation of an enlarged and upright image of an object by a lens. Name the lens used. Where should the object be placed relative to the lens? Will the image be real or virtual? Name a device where this action of lens is used.


How does a concave lens act as a ‘diverging lens’?


In the convex lens if an object is placed at 2 F1, the image is formed at ______.


The image formed by _______ lens is always virtual and small.


Write the name.

The distance between focus and optical centre.


Write the name.

The imaginary line passing through two optical centres of lens


When the incident ray is parallel to the principal axis, the refracted ray passes through the principal focus.


Write an Explanation.

Principal focus


Write scientific reason.

A convex lens is called a converging lens.


Write law in a given figure.


Explain with a ray diagram the position, size, and nature of the various image formed by convex lenses.

An object is at infinity.


Explain with a ray diagram the position, size, and nature of the various images formed by the convex lens.

An object beyond 2F1.


Explain with a ray diagram the position, size, and nature of the various images formed by a convex lens.

An object is in between F1 and 2F1


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


State whether the following statement is True or False

A concave lens can be used to produce an enlarged and erect image.


State whether the following statement is True or False

A convex lens always produces a real image.


Observe the figures given in 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?


Two different types of lenses are placed on a sheet of newspaper. How will you identify them without touching them?


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 be able to obtain the image on the screen? Explain.


A convex lens ‘A’ of focal length 20 cm and a concave lens ‘B’ of focal length 5 cm are kept along the same axis with a distance ‘d’ between them. If a parallel beam of light falling on ‘A’ leaves ‘B’ as a parallel beam, then the distance ‘d’ in cm will be ______.


A point object is placed at a distance of 60 cm from a convex lens of a focal length of 30 cm. If a plane mirror were put perpendicular to the principal axis of the lens and at a distance of 40 cm from it, the final image would be formed at a distance of:


A convex lens ‘A’ of focal length 20 cm and a concave lens ‘B’ of focal length 5 cm are kept along the same axis with a distance ‘d’ between them. If a parallel beam of light falling on ‘A’ leaves ‘B’ as a parallel beam, then the distance ‘d’ in cm will be ______


A point object is placed at a distance of 60 cm from a convex lens of focal length 30 cm. If a plane mirror were put perpendicular to the principal axis of the lens and at a distance of 40 cm from it, the final image would be formed at a distance of :


Distinguish between:

Concave Lens and Convex Lens


Distinguish between:

Concave lens and Convex Lens


Distinguish between:

Concave Lens and Convex Lens


Share
Notifications



      Forgot password?
Use app×