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What happens to an image when the focal length of the lens is reduced?
Wiki User
∙ 10y ago
If the Object you are 'focused' on stays in the same relative position to the lens, then the image will appear SMALLER on the Focal Plane.
For example, the image using a 50mm lens will be LARGER than using a 28mm lens.
Wiki User
∙ 10y ago
Wiki User
∙ 10y agoWhen the light intensity is reduced, the contrast of an image is dimmer or decrease.
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What happens to images that are closer to a concave mirror than the focal length?
The image is upright and magnified/enlarged.
What happens to the image distance in the eye when you increase the distance of an object from the eye?
If everything is working as it should, the image distance in the eye never changes. The image always needs to focus on the retina, which doesn't move. This is where the lens comes in, specifically its ability to change its focal length. When the object distance changes, the focal length has to change, in order to keep the image distance constant. Muscles around the lens change the shape of the lens, in order to change its focal length.
What happens to the image distance as the object distance increases?
the focal length of the eye lens is adjusted so that the image distance does not change.
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
How can you tell what the focal length is for a lens?
Easy way: Use it to form an image of the sun or moon, and measure the distance of the image behind the lens. When the object is at infinity, the distance between the lens and the image is the focal length of the lens.
What happens if you decrease a telescopes eyepiece focal length?
The magnification of the telescope image is(focal length of the objective) divided by (focal length of the eyepiece).The focal length of the objective is fixed.Decreasing the focal length of the eyepiece increases the magnification of the image.(But it also makes the image dimmer.)
What will decreasing a telescope's eyepiece focal length?
The magnification of the telescope image is(focal length of the objective) divided by (focal length of the eyepiece).The focal length of the objective is fixed.Decreasing the focal length of the eyepiece increases the magnification of the image.(But it also makes the image dimmer.)
What happens to images that are closer to a concave mirror than the focal length?
The image is upright and magnified/enlarged.
Focal length of a concave mirror?
1/object distance + 1/ image distance = 1/focal length
What are the two possibilities for an image formed by a convex lens?
Convex (I prefer converging lenses) lenses are thicker in the middle than at the edges. This causes the rays to converge towards the principle axis (line running through the center of the lens perpendicular to the surface). two images will be formed. When the object you are viewing is farther from the lens than the focal length you will have an inverted real image. This image can be enlarged (when the object is between the focal length and twice the focal length), the same size (when the object is twice the focal length from the lens) or reduced (when the object is beyond twice the focal length). When the object is closer to the lens than the focal length you are using the lense as a magnifying glass and you will have an upright virtual image.
What times what equals the total magnification'?
The focal length of the main optical system and the focal length of the lens forming the image.
What happens to the image distance in the eye when you increase the distance of an object from the eye?
If everything is working as it should, the image distance in the eye never changes. The image always needs to focus on the retina, which doesn't move. This is where the lens comes in, specifically its ability to change its focal length. When the object distance changes, the focal length has to change, in order to keep the image distance constant. Muscles around the lens change the shape of the lens, in order to change its focal length.
What happens to the image distance as the object distance increases?
the focal length of the eye lens is adjusted so that the image distance does not change.
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
How can you tell what the focal length is for a lens?
Easy way: Use it to form an image of the sun or moon, and measure the distance of the image behind the lens. When the object is at infinity, the distance between the lens and the image is the focal length of the lens.
What uses a long focal length a short focal length lens and has an inverted image?
a camera? Or an eye? Something like that. Weird question
