What is a point source wave?
When the source of the wavefront can be localized to a single point, the source is said to be a point source. • The figure shows a periodic surface wave spreading out from a point source.
What is point source and extended source?
Ans a) Point source is particularly localised emission or source of light at a point which decreases in proportiom to the inverse square of distance from the source while extended source are collection of such point sources of light together.
What is point source of light example?
Examples: Light from a distant star seen through a small telescope. Light passing through a pinhole or other small aperture, viewed from a distance much greater than the size of the hole. Light from a street light in a large-scale study of light pollution or street illumination.
What is a point source resource?
The U.S. Environmental Protection Agency (EPA) defines point source pollution as “any single identifiable source of pollution from which pollutants are discharged, such as a pipe, ditch, ship or factory smokestack.” Factories and sewage treatment plants are two common types of point sources.
What is a point source and nonpoint source?
Point and Nonpoint Pollution Sources Pollution originating from a single, identifiable source, such as a discharge pipe from a factory or sewage plant, is called point-source pollution. Pollution that does not originate from a single source, or point, is called nonpoint-source pollution.
What is a point source in astronomy?
A point source is an idealization. It is defined as a source that subtends an infinitesimally small angle. All objects in reality subtend at least a very tiny angle, but often it is mathematically convenient for astronomers to regard sources of very small extent as point sources.
What is a point source and nonpoint source of pollution?
What is the meaning of nonpoint source?
Non-point source of pollution are pollution sources that are diffused and without a single point of origin or not introduced into a receiving stream from a specific outlet. The pollutants are generally carried off the land by storm water run- off.
What are point and nonpoint sources of water pollution explain?
Water pollutants come from either point sources or dispersed sources. A point source is a pipe or channel, such as those used for discharge from an industrial facility or a city sewerage system. A dispersed (or nonpoint) source is a very broad unconfined area from which a variety of pollutants…