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How does focal length of convex lens change if monochromatic red light is used instead of monochromatic blue light?
Wiki User
∙ 14y ago
Blue light travels slower in glass then red and so has a higher index of refraction. That results in a shorter focal length.
Search Chromatic aberration in Wikipedia.org, "The World's Encyclopedia"
Wiki User
∙ 14y ago
Wiki User
∙ 14y agoThe prismatic effect is in charge. The two kinds of light bend differently in the lens. The blue, shorter wavelength focusing in a shorter distance than the longer red light. Newton rings are caused by this effect.
Wiki User
∙ 13y agoThe frequency of monochromatic red light is slower than the monochromatic blue light in the denser medium of the convex glass and will bend further as the emerging ray and the focal length will change.
Wiki User
∙ 16y agoNone for the mirror. For the lens, it depends on material.
Wiki User
∙ 14y agoThe index of refraction of the lens is different for different wavelengths of light, only by a little bit though.
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How does a focal length change as a convex lens becomes flatter?
d focal lenght increases due to increases in the distance between centre of curvature and the centre of the convex lens on the principal axis
What will happen to the focal length of a concave mirror or a convex mirror when the incident violet light on them is replaced by red light?
Nothing. The focal length is defined as point where all of the light converges after passing through the lens ( for a convex mirror)and only depends on the mirror's curvature. So changing the incident light ray will cause no change in the focal length of the mirror.
Which lens has a greater power convex lens of focal length 10 cm or a convex lens of focal length 20cm?
Power is inversely related to the focal length. So convex lens of focal length 20 cm has less power compared to that having focal length 10 cm
When do convex lens produce real image?
When the object length is less than the focal length
What is the power of a convex lens with 10cm focal length?
1.0 diopters
What happens to focal length when convex lens is cut horizontally?
no change
Why the study was under taken of focal length of a convex lens by graphical method?
to determine the focal length of a convex mirror.
How does a focal length change as a convex lens becomes flatter?
d focal lenght increases due to increases in the distance between centre of curvature and the centre of the convex lens on the principal axis
What will happen to the focal length of a concave mirror or a convex mirror when the incident violet light on them is replaced by red light?
Nothing. The focal length is defined as point where all of the light converges after passing through the lens ( for a convex mirror)and only depends on the mirror's curvature. So changing the incident light ray will cause no change in the focal length of the mirror.
Which lens has a greater power convex lens of focal length 10 cm or a convex lens of focal length 20cm?
Power is inversely related to the focal length. So convex lens of focal length 20 cm has less power compared to that having focal length 10 cm
When do convex lens produce real image?
When the object length is less than the focal length
If a convex lens of focal length f splits into two equal parts what will be the new focal length?
there can be two ways to cut a convex lens into two equal parts-- one, along the principal axis and another, perpendicular to the principal axis. If the lens is cut along the principal axis, then there will bo NO change in the focal length of the lens. But, if it is cut perpendicular to the principal axis, then the focal length will be twice the original one.
What is the power of a convex lens with 10cm focal length?
1.0 diopters
What happens to the focal length of convex lens when convex lens is cutted vertically along the optic center?
its focal lenght becomes 2f
What is the focal length of the convex lens?
The distance from the centre of the lens to the focal point.
What is focal length of a door peephole's lens and is it concave or convex?
The lens in a door peephole is a convex lens with a very short focal length, giving it a wide field of view. If it were on a camera, it would be called a "Fisheye lens".
Why do convex lenses have shorter focal lengths than thin convex lenses?
The convex lenses are converging lens so when the curvature of the lens increases the focal length will decrease which helps when looking up close. A thin convex lens is for seeing things from a distant.
