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What is the focal length of a concave mirror that forms an image 25 cm from the mirror if the object distance is 20 cm?
Wiki User
∙ 12y ago
1/o + 1/i = 1/f
f = (o x i)/(o + i)
f = 11.1 cm (rounded)
Wiki User
∙ 12y ago
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Focal length of a concave mirror?
1/object distance + 1/ image distance = 1/focal length
What shape is a concave mirror and what do things look like in it?
A concave mirror bulges away from the incident light. The image of an object depends on where exactly the object is placed - relative the to focal length of the mirror. See the attached link for more details.
An object is kept in front of a concave mirror of focal length 20cm the image is 3 times the size of the object calculate 2 possible diastances of the object from the mirror?
40cm
How does the distance of the object compare with the distance of the image from the plane mirror?
The distance of the object from the mirror line should equal the distance of the image from the mirror line.
A candle is placed on the principal axis of a concave mirror at a distance of 20 cm from the mirror the focal length of the mirror is 10cm the image formed will be?
Use 1/s + 1/s' = 1/f s = 20cm f = +10cm (positive since the mirror is concave) 1/s'=1/f - 1/s 1/s'=1/10 - 1/20 = 1/20 So, s'=20cm. The distance from the image to the mirror is 20cm, which is not surprising, since the object placed at 1/2 of the focal length and therefore exactly at the radius of curvature point. The image is real and inverted.
Why do images in a concave mirror appear inverted?
If an object's distance from the concave mirror is greater than the mirror's focal length, then the mirror image of it will be inverted. If the distance from the concave mirror is less than the focal length of the mirror, the image will not be inverted. No image will be produced if the distance from the mirror to the object is equal to the mirror's focal length.
Focal length of a concave mirror?
1/object distance + 1/ image distance = 1/focal length
What is the relationship between object distance image distance and focal length of concave mirror?
Sum of reciprocal of object distance and reciprocal of image distance gives the reciprocal of focal length
What is the relationship between object distance image distance and focal length of a concave mirror?
Sum of reciprocal of object distance and reciprocal of image distance gives the reciprocal of focal length
What factor influences the image produced by reflection of an object in a concave mirror?
Distance from the mirror, curvature of the mirror.
Which factor most influences the image produced by reflection of an object in a concave mirror?
distance from mirror
Which factors most influences the image produced by reflection of an object in an concave mirror?
distance from mirror
What factor most influences the image produced by reflection of an object in a concave?
Distance from the mirror, curvature of the mirror.
What shape is a concave mirror and what do things look like in it?
A concave mirror bulges away from the incident light. The image of an object depends on where exactly the object is placed - relative the to focal length of the mirror. See the attached link for more details.
An object is kept in front of a concave mirror of focal length 20cm the image is 3 times the size of the object calculate 2 possible diastances of the object from the mirror?
40cm
Where should the object be placed in order to produce a larger object behind a concave mirror?
The object should be necessarily be placed between the focal point of the concave mirror and the pole of the mirror to produce a larger image(not larger object) behind the concave mirror.
What is the nature of the image produced by a concave mirror if the object lies beyond twice of focal length?
real and inverted
