### equipment | photographic equipment:

Photographic photographic film
* A photographic film photographic material
* Photographic film is coated with a thin layer of silver chloride, silver bromide, or silver iodide
  - an emulsion containing light-sensitive silver halide crystals
  - chemicals that react when light shines on it
  - made of cellulose acetate
* Photographic films are coated with different mineral salts
  - located in suitcases
  - more efficient at measuring more energetic photons
  - usually more efficient when measuring more energetic photons
* Some photographic films are sensitive to ultraviolet energy, as are many electronic detectors.
+ Photography, Film
  * The picture the lens makes is recorded on photographic film. Film is placed inside the camera box. Light coming through the lens, aperture and open shutter shines on the film. Photographic film is coated with chemicals that react when light shines on it. Letting light shine on the film is called 'exposing' the film.

Photometer
* are optical instruments that measure the intensity or brightness of light from a source.
* is photographic equipment
* provide neither pictures nor spectra.
* record the flux of light in a given range of wavelengths from a given part of the sky.

### equipment | photographic equipment | photometer:

Spectrophotometer
* are especially useful for nutrient studies
  - laboratory equipment
  - located in chemistry labs
  - photometers
* can also measure luminescence.
* commonly have a stored program for turbidity that has been factory-calibrated.
* measure reflectance or transmittance as a function of wavelength
  - the intensity of a beam of light that exists in a sample
* merely absorb light.
* quantify optical absorber concentrations in optically clear media.
* require several minutes to perform the same task.
+ Spectrophotometer, Design: Spectroscopy
  * Spectrophotometers can also measure luminescence. For example, the machine can shine ultraviolet light of one frequency on the sample. This will excite the sample and make it glow. The detectors can the measuring the light glowing from the sample at a different frequency.

Pinball machine
* are electrical devices
  - mechanical devices
* is equipment

Protective equipment
* can prevent eye, head, face and mouth injuries.
* needs to be used when handling animals, especially trapped mammals.

Receiver
* are football players
  - located near stock
  - part of telephones
  - sets
  - tennis players
  - transducers
* have sensors.
* includes aerials
  - antennas
  - bases
  - circuits
  - electron tubes
  - resistors
  - sections
  - vacuum tubes
* use electrical energy

### equipment | receiver:

Television set
* Some television sets get very hot and are potential fire hazards.
* are communication devices
  - everywhere
* are located in houses
  - stores
  - particularly dangerous during thunderstorms
* use the same principles as particle accelerators.

Tuner
* are electronic components
  - expert systems that can make intelligent and instant decisions to improve performance
* are part of radios
  - tv
  - products
  - skilled workers

Tv set
* are films.
* are located in garages
  - solids

### equipment:

Recorder
* Create beautiful sounds with flute-like instruments.
* are equipment
  - flute-like instruments that are used to learn pitch, melody and harmony
  - judges
* includes circuits
  - the object that bridges the gap between the client code and the multimedia subsystem
* use microphones.
+ Recorder, Kinds of recorder: Flutes
  * Recorders are made in different sizes. This is the note that is heard when the player covers all the finger holes and the thumb hole. The soprano recorder is the size of recorder which is usually played in schools, also known as a Descant. Some recorders are smaller than the soprano recorder but are not common. The alto recorder is bigger than the soprano recorder. Instruments larger than the bass are made but are not common.