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If you have a concave mirror with focal length of 8.5 cm where would you place a piece of paper so the image projected onto it is twice as far from the mirror as the object is?
Wiki User
∙ 12y ago
Use the equation, 1/f = 1/di + 1/do
So, di/f = 1+1/m (m = magnitude)
If we are trying to find twice the distance, m=2
Therefore, di/f = 1+1/2
di/f = 1.5
Take the focal length out and plug it into the problem and you have, di = 8.5*1.5
So finally, di = 12.75
The piece of paper would have to be placed at 12.75cm in order for the real image to appear twice as far as the object.
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
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?
1/o + 1/i = 1/ff = (o x i)/(o + i)f = 11.1 cm (rounded)
An object is placed 4 cm in front of a concave mirror with a focal point of 1 cm describe the image that is formed?
A concave lens will appear!
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.
When an object is placed 8 millimeters from a concave spherical mirror a clear image can be projected on a screen 16 millimeters in front of the mirror. If the object has a height of 4 millimeters the?
c. 8 millimeters
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
Describe an image formed by concave mirror when an object is less than one focal length from the mirror?
This is for a concave spherical mirror. This depends on if the image is insed or outside the foacl point of the lens. If the image is outside the foacl point of the lense it is then inverted (upside down), smaller in magnification, and is a real image which means the rays converge to create a real image that can be projected. If the object is inside the foacl point of the lens then the image has a negative image distance (through the mirror), is upright, is larger (magnification), and is a virtual image constructed from diverging light rays and cannot be projected.
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
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
Why are you upsidedown when you look into a spoon?
The spoon acts as a concave mirror at it's "loading surface". The idol of an object through a concave mirror which is further than the doubled focal length of it, is real, smaller and inverted (upside-down).
How can a concave mirror produce a virtual image?
Virtual or real image... concave mirrors can form either virtual images or real images... i hope the answer would help you :)) Place the object closer to the mirror than its focal length.
