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What else can I help you with?
Is spectacles made of glass?
Not all... Some spectacle-makers use plastic lenses instead of glass.
A lens that curves outward is called?
)( is a concave lens() is a convex lens
Which of the following lenses is a converging lens A double-convex lens B spherical-convex lens C plano-concave lens D convexo-concave lens?
Double-convex lens
What two factors determine the type of image formed by lens?
The focal length of the lens and the distance between the lens and the object.
To magnify an object would you use a convex lens or a concave lens?
You would use a convex lens.
How do you spell specticel?
The correct spelling is spectacle (a viewed event, or a lens as in spectacles, or eyeglasses)
What are some examples of surface defects in spectacle lenses?
* Cracks * Scratches * Peeling (if there is a coating on the lens)
How can you determine the curvature and Refractive Index of spectacle glass?
The curvature of spectacle glass can be determined using a lensometer, which measures the curvature of the lens surface. The refractive index of spectacle glass can be determined by analyzing the way light passes through the lens and using equations that relate angles of light refraction to the refractive index of the material.
What is a standard lens notation RE Spectacle lenses?
In the US, spectacle lens prescriptions will generally follow the following format: Right Lens Sphere Power - Right Lens Cylinder Value - Right Lens Cylinder Axis Left Lens Sphere Power - Left Lens Cylinder Value - Left Lens Cylinder Axis Reading Addition Power Other information may also be included on the written prescription, but the necessary information listed above will always be included in the format indicated.
Carl Zeiss spectacle lens approximate price in India?
Approximately in the range 4800-10,000 Rupees
Who invention the compound microscope?
Zacharias Janssen and his son Johannes (Hans), spectacle makers in Holland, are usually credited with inventing the first compound microscope in about 1595. (Hans Lippershey a spectacle maker in the same city, Middelburg, Netherlands, also claimed credit for the invention but was perhaps more instrumental in the creation of the telescope.)Two decades later, Galileo Galilei built a compound microscope and changed the lens design lens (convex and concave lens).Galileo
Where did the hand lens were created?
The hand lens was invented in the 17th century by Dutch spectacle maker, Zacharias Janssen. He created the first compound microscope by combining lenses in a tube to magnify small objects.
What is the aberration affect spectacle lens?
Aberrations in spectacle lenses refer to imperfections that cause blurring or distortion in vision, such as spherical aberration (blurriness) or chromatic aberration (color fringing). These aberrations can occur due to lens design, material, or manufacturing processes, and can affect visual acuity and comfort for the wearer. Specialized lens designs like aspheric or high-index lenses aim to minimize aberrations for better vision.
Who invented the first hand lens?
William Julliano invented the first hand lens in 1991
Where was the compound microscope invented?
Zacharias Janssen and his son Johannes (Hans), spectacle makers in Holland, are usually credited with inventing the first compound microscope in about 1590. (Hans Lippershey a spectacle maker in the same city, Middelburg, Netherlands, also claimed credit for the invention but was perhaps more instrumental in the creation of the telescope.) Two decades later, Galileo Galilei built a compound microscope and changed the lens design lens (convex and concave lens).
Who invented compounded microscope?
Zacharias Janssen and his son Johannes (Hans), spectacle makers in Holland, are usually credited with inventing the first compound microscope in about 1595. (Hans Lippershey a spectacle maker in the same city, Middelburg, Netherlands, also claimed credit for the invention but was perhaps more instrumental in the creation of the telescope.)Two decades later, Galileo Galilei built a compound microscope and changed the lens design lens (convex and concave lens).Galileo
How do you spell monicules?
This might be one, or the other, of these words: MOLECULES - smallest components of compounds, or groups of atoms of an element MONOCLES - spectacle lenses used for only one eye
