Concave Mirror Optics Quiz

Play an AI-generated podcast conversation about this lesson

What happens to the image size when an object is placed 20cm in front of a concave mirror with a focal length of 15cm and forms a virtual image twice the size of the object?

The image size is equal to the object size.
The image size is twice the object size. (correct)
The image size decreases to half of the object size.
The image size is three times the object size.

If an object placed at a distance of 60cm from the pole of a concave mirror creates an image at a distance of 30cm from the pole, what is the magnification of the image?

1
1/2
3
2 (correct)

What ratio of the size of the image to the size of the object will result from a concave mirror if the distance from the object to the principal focus is 30cm and the focal length is 10cm?

1:3
2:1 (correct)
1:2
3:1

For a concave mirror with a focal length of 20cm, if the object is positioned at 60cm, what will be the nature of the image formed?

Real and inverted (D) Signup and view all the answers

When an object measuring 2mm is placed at the axis of a concave mirror with a radius of curvature of 40cm, what will be the behavior of the formed image?

The image will be real and magnified. (C) Signup and view all the answers

What will be the height of the image when an object of 2mm is placed on the axis of a convex mirror at a distance of 20cm with a radius of curvature of 40cm?

6mm (D) Signup and view all the answers

What is the ratio of the size of the image to the size of the object for a concave mirror with focal length f and object distance x?

$\frac{f}{f+x}$ (B) Signup and view all the answers

If a point object is placed 60cm from the principal focus of a concave mirror and its image is formed at the point of the object, what is the focal length of the mirror?

30cm (D) Signup and view all the answers

Given an object placed in front of a concave mirror with focal length 20cm, which distance could result in an image size that is 3 times the size of the object?

$\frac{80}{3}$ cm (A), $\frac{40}{3}$ cm (B) Signup and view all the answers

According to the sign convention for mirrors, which statement about distance measurement is incorrect?

Distance measured below the principal axis are positive. (D) Signup and view all the answers

Convex Mirror Image Height

The height of the image formed by a convex mirror when an object is placed at a given distance, is calculated using the mirror's formula and properties.

Concave Mirror Image Size Ratio

The ratio of image height to object height in a concave mirror depends on the object's position relative to the focal point. It is determined by the mirror equation.

Mirror Focal Point Position (Concave)

If an object is placed at a distance of 60cm from a concave mirror's focal point, and its image is formed at the object's location, the focal length is half the object distance.

Concave Mirror Image Size Possibilities

For a given concave mirror with a specific focal length, there can be two possible object distances resulting in an image three times the object size. It involves solving quadratic equations.