How do you find the radius of curvature of a mirror?

R=CF+FP. In other words, in the small-angle approximation, the focal length f of a concave spherical mirror is half of its radius of curvature, R: f=R2.

What is the focal length of a concave mirror whose radius of curvature is 12 cm?

focal length f of concave mirror = 1/2 of radius of curvature = 12/2 = 6 cm .

How far from a concave mirror of radius 120 cm must an object be placed such that its erect image is four times its natural size?

How far must a girl stand in front of a concave spherical mirror of radius 120 cm to see an erect image of her face four times its natural size? ⇒-60-60-u=4∴u=-45cm.

Which object is placed at radius of curvature?

An object is placed at the radius of curvature of a concave spherical mirror. The image formed by the mirror is. a. located at the focal point of the mirror.

How do you find the radius of curvature of a concave mirror?

Hint:The radius of curvature of convex or concave mirror is equal to two times of the focal length of convex or concave mirror. The radius of curvature is the radius of sphere formed by the convex or concave mirror. It is also equal to the distance between the pole and centre of curvature.

What is radius of curvature of concave mirror?

The distance from the vertex to the center of curvature is known as the radius of curvature (represented by R). The radius of curvature is the radius of the sphere from which the mirror was cut. In fact, if some light from the sun were collected by a concave mirror, then it would converge at the focal point.

What is the radius of curvature of the above concave mirror?

⇒ the length of the concave mirror is K/6 unit. ⇒ Radius of Curvature (R) = 2f ⇒ R = 2*(-K/6) or R = -K/3 unit. Therefore the Radius of Curvature (R) of Concave Mirror is K/3 unit.

How far must a man stand in front of a concave spherical mirror of radius 120 cm in order to see an erect image of his face four times its natural size?

A concave shaving mirror has a radius of curvature of 35. 0 cm. It is positioned so that the (upright) image of a mans face is 2. 50 times the size of the face.

How far must an object be from a concave mirror if the image formed is to be erect?

10 cm
A concave mirror forms an erect image of an object placed at a distance of 10 cm from it. The size of the image is double that of the object.

What happens if an object is placed at centre of curvature of a mirror?

When an object is placed at the centre of curvature in front of a concave mirror, the image will also be located at the centre of curvature. The image will be inverted. The size of the image will be equal to the size of the object. The formed image will be real and inverted.

When an object is placed at the centre of a curvature of a concave mirror the image formed is?

inverted
If an object is placed at centre of curvature of a concave mirror, light rays meet to form an image which is real, inverted and at the same size as that of the object. The image formed is not magnified.

What is the radius of curvature of a concave mirror?

The focal length (f) of the concave mirror is 4 cm, therefore the patient’s teeth should be less than 4 cm in front of a concave mirror. 8. A concave mirror has a radius of curvature of 24 cm.

Why is the image inverted at 30cm away from the mirror?

Since the object is further out than the focal point (which would be 30cm away from the mirror) the image will be inverted (and magnified with M=-1.5 in this case, since the object is still in the distance of two focal lengths to the mirror).

Why do the rays of a concave mirror converge after reflection?

The convergence of the rays after reflection is because the normal to the reflecting surface differs at each point on the mirror. There is a formation of different images in a concave mirror. It mainly depends on the distance between the object and the mirror. Concave mirrors form both real and virtual images.

What is the image height of the mirror image?

The image height is 10 cm. The positive sign indicates that the image is real or the image is 20 cm in front of the mirror, on the same side as the object. The negative sign means the image is inverted. The plus sign indicates that the image is real or the image is 15 cm in front of the mirror, on the same side as the object.