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Lenses are based on refraction - the change of direction of rays of light, when they change from one medium to another, such as from air to glass.
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Whats the focal length of a lens?
The focal length of a lens is the distance from the principal foci to the center of the lens.
Rays of light incident on a lens anb parallel to the principal axis of the lens converge?
They converge in the focus of the lens. It can be, of course, real or imaginary (it depends on if the lens is concave or convex, respectively).
Why does a converging lens behave as a burning glass?
Convex lenses focus parallel light rays from distant sources such as the sun to a single point on the principal axis of the lens. This point is called the principal focus of the convex lens. A source such as the sun is producing enough energy to heat a substance if it is placed at the principal focus point.
What type of lens will produce a virtual image longer in size that of object?
This is possible only with a convex lens but with a condition that the object has to be placed in between the optic centre and principal focus of the lens.
What direction does a focal ray from an object proceed after passing through a diverging lens?
Parallel to the principal axis
Whats the focal length of a lens?
The focal length of a lens is the distance from the principal foci to the center of the lens.
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.
Rays of light incident on a lens anb parallel to the principal axis of the lens converge?
They converge in the focus of the lens. It can be, of course, real or imaginary (it depends on if the lens is concave or convex, respectively).
Why does a converging lens behave as a burning glass?
Convex lenses focus parallel light rays from distant sources such as the sun to a single point on the principal axis of the lens. This point is called the principal focus of the convex lens. A source such as the sun is producing enough energy to heat a substance if it is placed at the principal focus point.
How do you say main dish in spanish?
main in spanish is "principal"
The light-gathering power of a telescope varies with the of the diameter of the lens or mirror?
Yes, that is correct. A greater main mirror, or main lens, will gather more light.Yes, that is correct. A greater main mirror, or main lens, will gather more light.Yes, that is correct. A greater main mirror, or main lens, will gather more light.Yes, that is correct. A greater main mirror, or main lens, will gather more light.
What type of lens will produce a virtual image longer in size that of object?
This is possible only with a convex lens but with a condition that the object has to be placed in between the optic centre and principal focus of the lens.
What are the three laws governing light passing through a converging lens?
Any incident ray traveling parallel to the principal axis of a converging lens will refract through the lens and travel through the focal point on the opposite side of the lens.Any incident ray traveling through the focal point on the way to the lens will refract through the lens and travel parallel to the principal axis.An incident ray that passes through the center of the lens will in effect continue in the same direction that it had when it entered the lens.
What principal form of energy received by a digital camera through its lens?
Electromagnetic energy
Define principal focus and principal aris?
principal focus is the ray which diverge at a point on the other side of the lensPrincipal Axis lens have two centre of culvature,the line passing through them and joining these centres is called principal axis.
Rays of light incident on lens and parallel to the principal axis of the lens converge?
This depends on the type of lens. If it is a convex lens then they converge at the focus on the other side of the lens. If it is a concave lens, then they diverge and appear to be coming from the focus present on the same side of the lens as the incident ray.
Curved glass that bends light rays?
A lens is a curved glass that refracts or bends light rays. The two principal types of lenses are convex and concave.
