Physics

Grade-10

Easy

Question

# An image of an object located at infinity was formed by a concave lens. The magnification of the image _____.

- Is greater than 1
- Is less than 1
- Is negative
- Tends to 0

Hint:

### For a **concave lens**, magnification of the image depends on the **size and position** of the object.

For an object located at infinity, formed by a concave lens, a **virtual and erect, highly diminished**(size tend to zero),** point sized image **is formed.

## The correct answer is: Tends to 0

### If an image of an object located at infinity was formed by a concave lens, the magnification of the image tends to zero.

- In a concave lens, magnification of the image depends on the size and position of the object.
- The image formed on the opposite side shows a magnified view.
- The magnification of the image kept at infinity distance in a concave lens will tend to zero.

### Related Questions to study

Physics

### The magnification of produced by a convex lens is – 4. This indicates that the image is ______.

- Real, inverted and magnified
- Real, inverted and diminished
- Virtual, upright and magnified
- Virtual, upright and diminished

### The magnification of produced by a convex lens is – 4. This indicates that the image is ______.

PhysicsGrade-10

- Real, inverted and magnified
- Real, inverted and diminished
- Virtual, upright and magnified
- Virtual, upright and diminished

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### An image of height 4 m is formed by a convex lens of an object of height 2 m. The magnification is _____.

### An image of height 4 m is formed by a convex lens of an object of height 2 m. The magnification is _____.

PhysicsGrade-10

Physics

### An object of height 2 m is located at a distance of 50 cm from a convex lens of focal length 25 cm. The image is of height ____ m.

### An object of height 2 m is located at a distance of 50 cm from a convex lens of focal length 25 cm. The image is of height ____ m.

PhysicsGrade-10

Physics

### The image of an object located at a distance of 25 cm towards the left of a concave lens is formed at a distance of 5 cm at the same side of the lens. The magnification produced by the lens is ____.

- 0.2
- -0.2
- 0.25
- -0.25

### The image of an object located at a distance of 25 cm towards the left of a concave lens is formed at a distance of 5 cm at the same side of the lens. The magnification produced by the lens is ____.

PhysicsGrade-10

- 0.2
- -0.2
- 0.25
- -0.25

Physics

### The magnification produced by a concave lens is always ____.

- Greater than 1
- Negative
- Positive
- None of these

### The magnification produced by a concave lens is always ____.

PhysicsGrade-10

- Greater than 1
- Negative
- Positive
- None of these

Physics

### Which of the following is correct?

- vh = uH
- uh = vH
- vuh = H
- vh = uvH

### Which of the following is correct?

PhysicsGrade-10

- vh = uH
- uh = vH
- vuh = H
- vh = uvH

Physics

### Which of the following is a formula to measure the magnification produced by a lens?

- v/u
- -v/u
- u/v
- -u/v

### Which of the following is a formula to measure the magnification produced by a lens?

PhysicsGrade-10

- v/u
- -v/u
- u/v
- -u/v

Physics

### What is the unit of measurement of magnification?

- m
- D
- It is unitless
- cm

### What is the unit of measurement of magnification?

PhysicsGrade-10

- m
- D
- It is unitless
- cm

Physics

### Magnification is mathematically given by ____, H is the height of the image and h is the height of the object.

- Hh
- h/H
- H/h
- H
^{2}h

### Magnification is mathematically given by ____, H is the height of the image and h is the height of the object.

PhysicsGrade-10

- Hh
- h/H
- H/h
- H
^{2}h

Physics

### “The radius of a convex lens is always negative.”

This statement is _____.

- True
- False

### “The radius of a convex lens is always negative.”

This statement is _____.

PhysicsGrade-10

- True
- False

Physics

### A _____ image is always formed at the opposite side of a lens, and a _______ image is always formed at the same side of a lens as the object.

- Real, virtual
- Real, real
- Virtual, virtual
- Virtual, real

### A _____ image is always formed at the opposite side of a lens, and a _______ image is always formed at the same side of a lens as the object.

PhysicsGrade-10

- Real, virtual
- Real, real
- Virtual, virtual
- Virtual, real

Physics

### An object is located in front of a convex lens of focal length 53 cm at a distance of 106 cm. The image of this object will be formed at a distance of ____ cm from the lens.

### An object is located in front of a convex lens of focal length 53 cm at a distance of 106 cm. The image of this object will be formed at a distance of ____ cm from the lens.

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### An object is situated at an infinite distance from a convex lens of focal length 55 cm. Its image will be formed _____.

- In the same side as the object
- In the opposite side as the object
- Behind the object
- At optic center

### An object is situated at an infinite distance from a convex lens of focal length 55 cm. Its image will be formed _____.

PhysicsGrade-10

- In the same side as the object
- In the opposite side as the object
- Behind the object
- At optic center

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### An object is situated at an infinite distance from a convex lens of focal length 55 cm. Its image will be formed at a distance of ___ cm from the lens.

### An object is situated at an infinite distance from a convex lens of focal length 55 cm. Its image will be formed at a distance of ___ cm from the lens.

PhysicsGrade-10

Physics

### The radius of curvature of a convex lens is 190 cm. Its focal length is ____ cm.

### The radius of curvature of a convex lens is 190 cm. Its focal length is ____ cm.

PhysicsGrade-10