List down at least five devices using optical parts. State what type of rules/ principles
are being used there.
Answers
Answer:
Explanation:
Optics is the branch of physics that studies the behaviour and properties of light, including its interactions with matter and the construction of instruments that use or detect it.[1] Optics usually describes the behaviour of visible, ultraviolet, and infrared light. Because light is an electromagnetic wave, other forms of electromagnetic radiation such as X-rays, microwaves, and radio waves exhibit similar properties.[1]
Most optical phenomena can be accounted for using the classical electromagnetic description of light. Complete electromagnetic descriptions of light are, however, often difficult to apply in practice. Practical optics is usually done using simplified models. The most common of these, geometric optics, treats light as a collection of rays that travel in straight lines and bend when they pass through or reflect from surfaces. Physical optics is a more comprehensive model of light, which includes wave effects such as diffraction and interference that cannot be accounted for in geometric optics. Historically, the ray-based model of light was developed first, followed by the wave model of light. Progress in electromagnetic theory in the 19th century led to the discovery that light waves were in fact electromagnetic radiation.
Some phenomena depend on the fact that light has both wave-like and particle-like properties. Explanation of these effects requires quantum mechanics. When considering light's particle-like properties, the light is modelled as a collection of particles called "photons". Quantum optics deals with the application of quantum mechanics to optical systems.
Optical science is relevant to and studied in many related disciplines including astronomy, various engineering fields, photography, and medicine (particularly ophthalmology and optometry). Practical applications of optics are found in a variety of technologies and everyday objects, including mirrors, lenses, telescopes, microscopes, lasers, and fibre optics.
Classical optics
Edit
Classical optics is divided into two main branches: geometrical (or ray) optics and physical (or wave) optics. In geometrical optics, light is considered to travel in straight lines, while in physical optics, light is considered as an electromagnetic wave.
Geometrical optics can be viewed as an approximation of physical optics that applies when the wavelength of the light used is much smaller than the size of the optical elements in the system being modelled.
Physical optics
Edit
Main article: Physical optics
In physical optics, light is considered to propagate as a wave. This model predicts phenomena such as interference and diffraction, which are not explained by geometric optics. The speed of light waves in air is approximately 3.0×108 m/s (exactly 299,792,458 m/s in vacuum). The wavelength of visible light waves varies between 400 and 700 nm, but the term "light" is also often applied to infrared (0.7–300 μm) and ultraviolet radiation (10–400 nm).
mirrors, lenses, telescopes, microscopes, lasers, and fibre optics.
Answer:
Here are some devices with optical parts:
- Car side mirror
- Microscope
- Car rear view mirror
- Binoculars
- Sniper rifle lenses
- Telescope
- Periscope in submarines
- Eye glasses with lenses.
- Fibre optic cables
- Digital cameras (including Phone Cameras)
Explanation:
Devices such as periscopes, rear view mirrors, side mirrors and fiber optics use mirrors. Mirrors are the components that make up their optical parts.
In periscopes, the princple in work is total internal refelection - this allows the bending of light in corners and over objects to view images.
Side mirrors, rear view mirrors and fibre optics use mirrors to reflect light.
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Devices such as eyeglasses, telescopes, binoculars, microscopes and cameras and sniper rifles have lenses in them which enable the magnification of images and/or the focusing of images (in the case of cameras and eyeglasses).
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