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Why does the focal length of a mirror not depend on the mirror material when the focal length of a lens does depend on the lens material?
Wiki User
∙ 12y ago
The focal length for a mirror is determined by the law of reflection from the mirror surface. This law is not governed by the material that the mirror is made by. This means that the focal length depends only on the radius and curvature. Conversely, the focal length of a lens depends on the indices of refraction of the lens meterial and the surrounding medium.
Wiki User
∙ 12y ago
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How tall mirror do you need to see your body full length?
That will depend upon your focal length--how far your eye is from the mirror. At a useful focal length the mirror can only be a few inches shorter than the subject.
How is the focal length of a spherical mirror affected when the wavelength of light used is increased?
The focal length does not depend upon the wavelength or the frequency so it remains unaffected.
How can a rough value of the focal length of a concave mirror be obtained?
rough focal length of concave mirror
What is the focal length of a mirror when it is placed in water with respect to air?
The focal length remains the same because only refraction is affected by the different media. Reflection does not depend on the media.
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.
The relation between focal length and radius of curvature of spherical mirror is?
The focal length of a convex mirror is half of its radius of curvature.
Why does the focal length of a concave mirror not change when held in water?
The focal length of a concave mirror is a function of its radius only (a geometry function), not of its material nor the material surrounding it. To change the focal length you wound have to alter it physically. Keep in mind that the light or whatever is being focused does not make a media change. It never enters the mirror media. It is always in the surround media, whatever that is, so Snell's law does not apply here.
What is a focal length of a plane mirror?
Focaal length for plane mirror is 0
The distance between a mirror and its focal point is called the?
Focal length, positive number with a concave mirror, negative for a convex mirror.
What is the power of a plane mirror?
Power is ZERO Since power = 1/ focal length As focal length of plane mirror is infinity, its reciprocal is 0
Focal length of a concave mirror?
1/object distance + 1/ image distance = 1/focal length
Which term defines the distance from the focal point to either a lens or a mirror?
focal length
