answersLogoWhite

0

The focal length of a concave mirror is half of its radius of curvature. Therefore, for a concave mirror with a radius of 20 cm, the focal length would be 10 cm.

User Avatar

AnswerBot

∙ 2y ago

What else can I help you with?

Related Questions

What is the relationship between the radius of curvature and focal length in a concave mirror?

In a concave mirror, the radius of curvature is twice the focal length.


What is the focal length of concave mirror to form real image?

The focal length of a concave mirror to form a real image is positive. It is equal to half the radius of curvature (R) of the mirror, and the image is formed between the focal point and the mirror.


What is the relation between focal length and center of curvature?

The focal length of a concave mirror is about equal to half of its radius of curvature.


For very small angles the focal length of a concave mirror is?

For very small angles, the focal length of a concave mirror is approximately half of the radius of curvature of the mirror. This is known as the mirror equation and holds true for small angles under the paraxial approximation.


Why the focal length of concave mirror changes in water?

I don't think so. The focal length would remain the same. It mainly depends on the radius of curvature of the mirror.


What is Focal length of a concave mirror?

It is the point , on the central axis, where light, that is parallel to the central axis, passes thru after it is reflected from the mirror. It is also at a distance from the mirror equal to twice the radius of curvature of the mirror.


If the focal lenght of a concave mirror is 15 cm find the radius of curvature?

The radius of curvature and the focal length mean the same so the radius of curvature is also 15 cm.


What is a concave mirror has a radius of curvature of 40.5 cm. how far is the mirror from the persons face?

The focal length of a mirror with a radius of curvature of 40.5 cm is half of the radius, so it is 20.25 cm. The mirror's face would be placed around this focal length distance from the person's face for optimal viewing.


How can a rough value of the focal length of a concave mirror be obtained?

One way to estimate the focal length of a concave mirror is to use the mirror formula: 1/f = 1/do + 1/di, where f is the focal length, do is the object distance, and di is the image distance. By measuring the object distance and the corresponding image distance, you can calculate an approximate value for the focal length of the concave mirror.


Will focal length of a concave mirror would increase decrease stay the same if the mirror were made flatter?

If a concave mirror is made flatter, its focal length will increase. This is because a flatter mirror has a larger radius of curvature, resulting in light rays converging at a point farther away from the mirror.


WHAT HAPPENS TO THE FOCAL LENGTH OF A CONCAVE MIRROR AS THE CURVATURE OF THE MIRROR IS INCREASED?

As the curvature of a concave mirror is increased, the focal length decreases. This means that the mirror will converge light rays to a focal point at a shorter distance from the mirror. The mirror will have a stronger focusing ability.


Why does the focal length of a concave mirror not change when held in water?

The focal length of a concave mirror is a function of its radius only (a geometry function), not of its material nor the material surrounding it. To change the focal length you wound have to alter it physically. Keep in mind that the light or whatever is being focused does not make a media change. It never enters the mirror media. It is always in the surround media, whatever that is, so Snell's law does not apply here.

Trending Questions
How do you use the word physical properties in a sentence? The distance from the crest of one wave to the crest of the next wave is? How far does light travel in a second? What factor determine the location and size and shape and direction of the surface current gyres? What happens while bending rubber slipper? Why Stimulus strength affect the twitch force? What is the conflict between Nikola Tesla and Edison? What happens if you jump before an elevator crashes? How much electricity goes into a generator a second? What are some houshold objects that are conductors or insulators? How do unbalanced forces affect the speed or direction of an object? Can an object be accelerated if it is moving with constant speed if yes explain giving example? How does potential energy of an object change when its height is tripled? Which energy transformation occurs in a rubber band powered model airplane when it is flown? A person does 50j of work to lift a crate using a pulley. the pulley's work output is 42j. What is the pully's mechanical efficiency? What state of soundproduced by the vibration of the vocal chords is made loud by air chambers as resonators? What did you observe when you plucked each rubber band and sound is produced How then is sound produced? Are objects lighter in water than in air? How many electrons go on the outer most energy level on an atom? How do you solve a 200-lb crate lies on the floor. The coefficient of static friction between the crate and the floor is 0.60. What is the minimum force required to start the crate sliding?