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What is the name given to a piece of glass having one or two spherical surfaces?
A piece of glass with one or two spherical surfaces is called a lens. Lenses are commonly used in optics to refract light and focus images.
What lens that has two curves on the front surface is a?
convex
What lens has an object more than two focal lengths from the lens that will have an inverted message?
A diverging lens, such as a concave lens, will produce an inverted image when the object is located more than two focal lengths away from the lens. This is because the diverging lens causes light rays to spread out, resulting in the image being flipped vertically.
What uses two lens and mirror?
Reflecting TelescopeA reflecting telescope uses a lens and two mirrors. The lens is positioned at the eyepiece, and thus the focus, which the two mirrors generated by specifically redirected light. There are two types of reflecting telescopes with one lens and two mirrors, the Newtonian Focus and the Cassegrain Focus.
How does a two lens microscope work?
A two lens microscope uses a combination of an objective lens and an eyepiece lens to magnify an image. The objective lens captures the image and magnifies it, then the eyepiece lens further magnifies the image to allow for viewing. This combination of lenses allows for high magnification and resolution of the specimen being observed.
A Microsoft with two lens call what?
Bill Gates wearing glasses?
Jim bought a pair of glasses the lenses had six sides the lenses were in the shape of a?
A two dimensional shape with six sides, such as the lens for Jim's glasses, is called a hexagon. Another common example of a hexagon is a stop sign.
What are the glasses called that have lines for lenses?
They are still called glasses .......................i thinkThey are called bifocals. This means that there's two different prescriptions on the same lens.
List two uses for concave lens?
Both concave and convex lenses are used in glasses; A microscope, like a reflecting telescope, uses a concave mirror, a plane mirror, and a convex lens; A refracting telescope uses two convex lenses to magnify images in the sky; binoculars use concave lenses to improve detail.
How did bifocal got its name?
Two focal lengths in one lens.
What is another name for eye shape?
This shape is called a lens, a biconvex shape comprising two circular arcs, joined at their endpoints. Loosely, it could be said to be an ellipse.
Do you say two pairs of glasses or two pair of glasses?
two pairs of glasses
How do you switch a prescription for glasses to contacts?
You don't. The optometrist has to do a contact lens evaluation and fitting. Contact lenses Rx's are done separately,not to be mistaken for routine exam. Most insurances don't cover contact lens fittings. Contact lenses do not mean you can wear an old pair of glasses as backup. You will need a good pair of glasses with current Rx properly fitted. Contact lens Rx is good for one year to the day and glasses Rx is good for two years to the day.
What are two uses for a convex lens?
Concave lenses are used in glasses for people who are near-sighted. Convex lenses are used in glasses for people who are far-sighted.
Why did benjamin franklin invent bifocal glasses?
Because he needed them himself. Both his distant vision and his near vision were becoming weaker. He invented bifocals because he was tired of swapping from his reading glasses to his "looking out the window" glasses. He wanted something that combined both of them. To create bifocals, he put half of the lens from his "looking out the window" glasses in the top half of the eyeglass frame, and then half of the lens from his reading glasses into the bottom half of the frames. The combined form became popular and helpful to many people. Of course, he later used shortened versions of these lenses that worked even better. People who are both far-sighted and near-sighted only need one pair of glasses.
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.
Why is a pair of glasses a pair if its only one?
When you say "glasses", it is plural. A "glass" is one of the lenses. "Glasses" would refer to both of the lenses, and a "pair of glasses" doesn't mention anything about the frame, but it mentions the two lenses. The frame is the object that joins the two lenses so you don't have to wear contacts and so it can stay on your head. When you say "a pair of glasses", you are referring to the "pair of lenses", not the frame. The frame holding the two lenses makes us think that it is one object, when the word "glasses" refers only to the lenses, not the frame. That is why it is called "a pair of glasses".
