Light Box

Examples of Light Box in the following topics:

• Point-of-Purchase Promotions

  • Non-disposable displays may include lighting for more visibility or include a cooler for drinks or ice cream.
  • A light box is the advertising industry term for a lighted POS display.
  • These are similar to ones used by photographers, and use fluorescent bulbs to illuminate a poster that has been inserted into the light box from either the side or the rear.

• Energy Density

  • Let's imagine that light is traveling through a small box.
  • How much energy is in the box at any time?
  • First it is easiest to think about how much energy in the box is traveling in a particular direction through the box during a small time interval such that $c dt$ is the length of the box,
  • This energy equals the energy that enters the box traveling in the right direction during the time interval $dt$,

• Development of Photography

  • A photograph is created by light falling on a light-sensitive surface.
  • The word "photograph" is based on the Greek phos meaning light and graphe meaning drawing, together meaning drawing with light.
  • In the 5th century BCE, before the first camera was ever invented, Chinese and Greek philosophers described the "pinhole camera," a lightproof box with a tiny hole in one side that light passes through while projecting an inverted image one side .
  • Niepce began to work with Louis Daguerre and the two conducted experiments with silver compounds, based on a theory of Johann Heinrich Schultz, who proved that the mixture of silver and chalk darkens when it is exposed to light.
  • For example, the ambrotype mimicked the look of the daguerreotype with its reflective surface; however, the newer technology used a light-sensitized glass surface instead of copper, which made for a much cheaper photograph to produce and purchase.

• Absorption of Light

  • Light energy initiates the process of photosynthesis when pigments absorb the light.
  • For example, retinal pigments can only "see" (absorb) 700 nm to 400 nm light; this is visible light.
  • Chlorophyll a absorbs light in the blue-violet region, while chlorophyll b absorbs red-blue light.
  • Other organisms grow in competition for light.
  • Chlorophyll a and b, which are identical except for the part indicated in the red box, are responsible for the green color of leaves. β-carotene is responsible for the orange color in carrots.

• Photochemistry

  • The study of chemical reactions, isomerizations and physical behavior that may occur under the influence of visible and/or ultraviolet light is called Photochemistry.
  • The first law of photochemistry, the Grotthuss-Draper law, states that light must be absorbed by a compound in order for a photochemical reaction to take place.
  • This "photoequivalence law" was derived by Albert Einstein during his development of the quantum (photon) theory of light.
  • For example, irradiation of acetone with 313 nm light (3130 Å ) gives a complex mixture of products, as shown in the following diagram.
  • Several secondary radical reactions then follow (shown in the gray box), making it difficult to assign a quantum yield to the primary reaction.

• Making a Box Model

  • A box plot (also called a box-and-whisker diagram) is a simple visual representation of key features of a univariate sample.
  • A box plot (also called a box and whisker diagram) is a simple visual representation of key features of a univariate sample.
  • The box lies on a vertical axis in the range of the sample.
  • The width of the box is arbitrary, as there is no x-axis.
  • Produce a box plot that is representative of a data set.

• Box Plots

  • There are several steps in constructing a box plot.
  • The 50th percentile is drawn inside the box.
  • Continuing with the box plots, we put "whiskers" above and below each box to give additional information about the spread of data.
  • For example, the box plots in Figure 6 are constructed from our data but differ from the previous box plots in several ways.
  • The box for the women is wider than the box for the men because the widths of the boxes are proportional to the number of subjects of each gender (31 women and 16 men).

• When building new, think before doing

  • Cover parking areas with light-coloured cement or other light-coloured surfacing rather than asphalt.
  • Chunky, light-coloured gravel that has had its finer particles removed allows rain and snow to be absorbed into the ground.
  • To prevent solar heat build-up, paint buildings a light colour and make sure the finish is shiny and smooth.
  • Ivy or grapevines grown in window boxes or on trellises can shade and beautify entire sides of a building (this is called a ‘green wall').

• Other Forms of Energy

  • An example of an electromagnetic wave is light.
  • An example of something that creates sound energy is your voice box (larynx).
  • Luminous Energy: This is energy that can be seen because it is visible light.
  • An example of luminous energy is light from a flashlight.

• Cinema

  • Box office sales leapt to new heights as the studio system became the dominant business model in movie making.
  • In 1928, Warner Bros. released "Lights of New York," the first all-talking feature film.
  • The period saw the emergence of box office stars, many of whom are still household names, such as Mae Murray, Ramón Novarro, Rudolph Valentino, Charlie Chaplin, Buster Keaton, Harold Lloyd, Warner Baxter, Clara Bow, Louise Brooks, Bebe Daniels, Billie Dove, Dorothy Mackaill, Mary Astor, Nancy Carroll, Janet Gaynor, Charles Farrell, William Haines, Conrad Nagel, John Gilbert, Greta Garbo, Dolores del Río, Norma Talmadge, Colleen Moore, Nita Naldi, John Barrymore, Norma Shearer, Joan Crawford, Mary Pickford, Douglas Fairbanks, Anna May Wong, and Al Jolson.
  • American actress Louise Brooks was one of the box office stars who became famous in the 1920s at the outset of the Golden Age of Hollywood.