Question

find the focal length of a convex mirror of radius of curvature 1m.

Answer 1

Answer:

The answer is 0.5 m.

Explanation:

Focal length is the distance between the center of a lens and a convex or concave mirror. Focal length converges or diverges the light.

Formula of focal length for radius curvature is as below.

f = R/2

The value of radius of curvature is, R = 1 m

f = 1/2

f = 0.5 m

Hence focal length become the half of the radius of curvature.

Answer 2

Answer:

Concept:

An optical system's focal length, which is the inverse of the system's optical power, indicates how strongly the system convergence rate or diverges light. A system with a positive focal length is said to converge light, and one with a negative focal length is said to diverge light. When a lens is focused at infinity, its focal length is calculated. The angle of view, or how much of the scene will be caught, and the magnification, or how big the individual elements will be, are both determined by the lens focal length. The smaller the angle of view and the greater the magnification, the longer the focal length.

Given:

Find the focal length of a convex mirror of radius of curvature 1m.

Find:

Find the focal length of a given question

Answer:

• The convex lens, often referred to as the converging lens, is thicker in the centre and thinner at the corners.
• On either side of the convex lens, the light refracting rays from the straight beam of light converge.
• The image would've been actual, reversed, and very small if it were captured at the lens' focus.
• The distance between the lens' optical centre and the main focus is called the focal length, or f.
• Since the image created by the lens is a true representation, it may be obtained on the screen.

focal length, $f=?$

radius of curvature, $R=1m$ ( + for convex mirror )

As $f=\frac{R}{2}$,

∴ $f=\frac{1}{2}$

$f=0.5m$

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