Mirrors plane and curved flashcards

What is a plane mirror?

A flat reflective surface that produces virtual images. The image appears the same size as the object.

Characteristics of virtual images

Virtual images cannot be projected. They appear upright and are formed behind the mirror.

Difference between concave and convex mirrors

Concave mirrors can focus light to a point. Convex mirrors spread light rays and diverge images.

True or False: Concave mirrors form only real images.

False, because concave mirrors can also form virtual images when the object is close.

What happens to light rays in a concave mirror?

They converge to a focal point, allowing magnified images when objects are close.

Fill in the blank: The focal point of a concave mirror is __________.

in front of the mirror.

What is a convex mirror used for?

Mainly for security and side-view mirrors. They provide a wider field of view.

Characteristics of real images

Real images can be projected onto a screen. They are inverted and can vary in size.

How to calculate the focal length of a mirror?

$\displaystyle f = \frac{R}{2}$, where $\displaystyle R$ is the radius of curvature.

True or False: Plane mirrors have a focal point.

False, because plane mirrors do not converge light; they have an infinite focal length.

Question: What distance do objects need for a real image in a concave mirror?

Objects must be beyond the focal point.

Difference between the image in a plane mirror and a convex mirror

Plane mirrors show the same size; convex mirrors produce smaller, virtual images.

What is the reflection law?

Angle of incidence equals the angle of reflection: $\displaystyle heta_i = heta_r$.

Fill in the blank: Convex mirrors have __________ focal lengths.

negative