F=15 and object distance=25 and radius is=30
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Answer:
For a concave mirror, image size is same as the object size when it is placed at the center of curvature. Since radius of the mirror is twice the focal length, center of curvature lies at a distance of 30 cm from the pole. Hence, an object kept at 30 cm will produce an image of the same size as that of the object.
Explanation:
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The focal length of a concave mirror is 15 cm. An object is placed at a distance of 5 cm, 18 cm, 30 cm and 40 cm from the mirror, turn by turn. Which position of the object will produce an image of the same size as the object?
The focal length of a concave mirror is 15 cm. An object is placed at a distance of 5 cm, 18 cm, 30 cm and 40 cm from the mirror, turn by turn. Which position of the object will produce an image of the same size as the object?30 cm
The focal length of a concave mirror is 15 cm. An object is placed at a distance of 5 cm, 18 cm, 30 cm and 40 cm from the mirror, turn by turn. Which position of the object will produce an image of the same size as the object?30 cmFor a concave mirror, image size is same as the object size when it is placed at the center of curvature. Since radius of the mirror is twice the focal length, center of curvature lies at a distance of 30 cm from the pole. Hence, an object kept at 30 cm will produce an image of the same size as that of the object.