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2. X-ray - Wikipedia

   en.wikipedia.org/wiki/X-ray

   Daniel reported that 21 days after taking a picture of Dudley's skull (with an exposure time of one hour), he noticed a bald spot 5 centimeters (2 in) in diameter on the part of his head nearest the X-ray tube: "A plate holder with the plates towards the side of the skull was fastened and a coin placed between the skull and the head. The tube ...

3. Geometrical optics - Wikipedia

   en.wikipedia.org/wiki/Geometrical_optics

   Geometrical optics, or ray optics, is a model of optics that describes light propagation in terms of rays. The ray in geometrical optics is an abstraction useful for approximating the paths along which light propagates under certain circumstances. The simplifying assumptions of geometrical optics include that light rays: propagate in straight ...

4. Radiology - Wikipedia

   en.wikipedia.org/wiki/Radiology

   A radiologist interpreting magnetic resonance imaging. Dr. Macintyre's X-Ray Film (1896) Radiology ( / ˌreɪdɪˈɒlədʒi / rey-dee-ol-uh-jee) is the medical specialty that uses medical imaging to diagnose diseases and guide their treatment, within the bodies of humans and other animals. It began with radiography (which is why its name has a ...

5. Optics - Wikipedia

   en.wikipedia.org/wiki/Optics

   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. Light is a type of electromagnetic radiation, and other forms of ...

6. Electromagnetic spectrum - Wikipedia

   en.wikipedia.org/wiki/Electromagnetic_spectrum

   The electromagnetic spectrum is the full range of electromagnetic radiation, organized by frequency or wavelength. The spectrum is divided into separate bands, with different names for the electromagnetic waves within each band. From low to high frequency these are: radio waves, microwaves, infrared, visible light, ultraviolet, X-rays, and ...

7. Ray (TV series) - Wikipedia

   en.wikipedia.org/wiki/Ray_(TV_series)

   June 25, 2021. ( 2021-06-25TIndia) Ray is an Indian anthology drama television series on Netflix created by Sayantan Mukherjee, based on the works of Satyajit Ray. The series is directed by Srijit Mukherji, Vasan Bala and Abhishek Chaubey. It is produced by Ajit Andhare, Tipping point and Viacom18 Studios. The series features Manoj Bajpayee ...

8. Line (geometry) - Wikipedia

   en.wikipedia.org/wiki/Line_(geometry)

   A ray with a terminus at A, with two points B and C on the right. Given a line and any point A on it, we may consider A as decomposing this line into two parts. Each such part is called a ray and the point A is called its initial point. It is also known as half-line, a one-dimensional half-space. The point A is considered to be a member of the ray.

9. X-ray crystallography - Wikipedia

   en.wikipedia.org/wiki/X-ray_crystallography

   X-ray crystallography is the experimental science of determining the atomic and molecular structure of a crystal, in which the crystalline structure causes a beam of incident X-rays to diffract in specific directions. By measuring the angles and intensities of the X-ray diffraction, a crystallographer can produce a three-dimensional picture of ...