What is the radius of curvature of a concave mirror?

The radius of curvature of a concave mirror is 20 cm. Where should an object be placed in front of the concave mirror so that the real image i… An object is placed at a distance of 20 cm from a concave mirror of focal length 15 cm.

What is the distance of the object in front of the mirror?

, BAHons Natural Sciences, retired Science teacher, specialising in Physics. Well, f = r/2 = 60cm. As I is 4x O, then v = – 4u, where v is the distance to the virtual image, which is negative, and u is the distance of the object in front of the mirror.

How do you find the focal length of a flat mirror?

Ray tracing for a flat mirror shows that the image is located a distance behind the mirror equal to the distance of the object from the mirror. This is stated as d i = − d o, since this is a negative image distance (it is a virtual image). What is the focal length of a flat mirror? 39 .

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.

What is the size of the image formed behind the mirror?

Size of the Image: Diminished. Focal Length (f) = 2R = 30 / 2 = 15 cm (By using Sign Convention) Image distance is 8.57 cm behind the convex mirror. As the v is positive the image formed is virtual and erect.

What is the image distance behind the convex mirror?

Image distance is 8.57 cm behind the convex mirror. As the v is positive the image formed is virtual and erect. This indicates that the image is diminished because the magnification of the image is less than 1. As the image formed is smaller than the height of the object the image formed is diminished.

How do you find the distance between an image and object?

The distance between object and image = 5 meters. Solution : The size of the image produced by a convex mirror is always smaller than the size of the object, therefore, the mirror is a concave mirror. Object distance (d) = x. Image distance (d’) = x + 5. Image magnification (M) = 5 times.

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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.

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).

How do you find the magnification of a 6 cm image?

The magnification of the image (M) : M = di/do = 30 cm / 60 cm = 1/2 times 6. If the object is placed 6 cm from a concave mirror, the image distance is 12 cm as shown in figure below.