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Why are the light rays coming from a distant object are assumed to be parallel?
Instead of parallel rays, consider the light as a wave front. It leaves the source in a spherical wavefront. At a certain distance the sphere is so large and the curvature of the wavefront becomes so small that it can be considered locally flat, and behaves optically as though it were flat. At that point, the flat wave front is equivalent to parallel rays (which are perpendicular to the front).
What is the purpose of the collimator?
allow only parallel rays from strem of rays
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.
Explain how both kinds of reflection obey the law of reflection?
The angle of reflection equals the angle of incidence. In regular reflection, parallel rays strike are reflected from smooth surface at the same angle in diffuse reflection, parallel rays strike and are reflected from a bumpy surface at different angles.
What is the need to use telescope in spectrometer?
The collimator present in a spectrometer convert the rays from the source to parallel rays .Telescope is used to watch the parallel rays which means for the telescope the object is located at infinity.so that we use telescope.
What are light rays that never meet?
Light rays that never meet are called parallel rays. These rays travel in the same direction without intersecting or converging at any point. This property makes them useful in physics and optics for analyzing how light behaves.
What is the difference between the way parallel light rays are affected by a concave mirror and a concave lens?
The difference between the two is that once the light passes through the concave lens it diverges, and the rays are refracted outward, and never meet a focal point. Then there is the parallel light rays that bounce off the curved surface of a concave mirror and then meet a single point ( focal point).
What do parallel lines do when they hit a convex lens?
Parallel lines of light rays hitting a convex lens will converge towards a single point after passing through the lens. This point is known as the focal point, where the light rays meet and diverge after passing through the lens.
What lens bulges outwards and causes light rays to meet or converge?
A convex lens bulges outwards and causes light rays to meet or converge at a focal point. This type of lens causes parallel rays to be focused down to a point.
Why can rays be perpendicular but not parallel?
Rays pass through one point. Parallel lines never meet.
What term indicates the point where reflected light ray meet along an optical axis?
A focal point is the point where reflected light rays meet along an optical axis.
Parallel rays can be made to meet at one place called?
In Euclidean geometry they cannot. In other geometries they can meet at various points, depending on the configuration of the space. In projective geometry, for example, they meet at the "point at infinity". In physics, though, parallel rays (of light, for example), can be made to meet at the focus of a lens or mirror.
Why does light from stars arrive at a telescope as parallel rays?
Light from stars arrives at a telescope as parallel rays because stars are very far away compared to the size of a telescope's aperture. This distance makes the light rays effectively parallel when they reach the telescope, similar to how sunlight reaches Earth as parallel rays.
How does a lens bring diverging light rays to parallel tracks?
A lens brings diverging light rays to parallel tracks by refracting the light rays as they pass through the lens. The shape of the lens causes the light rays to converge and then diverge again, ultimately causing them to travel in parallel paths.
What is the point where light rays meet called?
The point where light rays meet is called the focal point.
Which is the name for the place where extended life rays meet for curved mirror?
The focal point is where extended parallel rays converge or meet after reflection from a concave mirror. This is a key concept in understanding how curved mirrors focus light.
Is the point at which light rays parellel to the optical axis meet?
The point at which light rays parallel to the optical axis come together or appear to come together after passing through a lens is known as the focal point.
