27. What the main idea is for this paragraph.Black-and-white camera film, in the old days of photography, was very sensitive to blue light but not tored light. Blue skies would often show very little detail, because the film couldn’t record all thatit was seeing. To compensate, photographers would put a red filter on the lens, darkening the skyenough that the film could record its fluffy clouds.This paragraph best supports the statement that,A. Red filters were very popular in the old days of photography.B. Infrared rays are invisible to the naked eye.C. Black-and-white photography used to be very popular.D. Red filters cut out some blue light on black and white film.E. Blue filters cut out red light.28. The use of desktop computer equipment and software to create high quality documents such asnewsletters, business cards, letterhead, and brochures is called Desktop Publishing, or DTP. Themost important part of any DTP project is planning. Before you begin, you should know your intendedaudience, the message you want to communicate, and what form your message will take.The paragraph best supports the statement that,A. Desktop Publishing is one way to become acquainted with a new business audience.B. Computer software is continually being refined to produce high quality printing.C. The first stage of any proposed DTP project should be organization and design.D. The planning stage of any DTP project should include talking with the intended audience

Black-and-white camera film, in the old days of film photography, was very sensitive to blue light but not to red light. Blue skies would often show very little detail, because the film couldn't record all that it was seeing. To compensate, photographers would put a red filter on the lens, darkening the sky enough that the film could record its fluffy clouds. This paragraph best supports the statement that. infrared rays are invisible to the naked eye. black-and-white photography used to be very popular. red filters were very popular in the old days of photography. red filters cut out some blue light on black and white film.

Q1.  "They" in paragraph 2 probably refers to_______.  blue glasses   red glasses   3-D effect in the movie   black sunglasses        Q2.  According to paragraph 4, modern 3-D movies rely on the use of the following equipment except …  Projecting screen   Polarizing filters   Glasses   Special lighting        Q3.  In paragraph 3, "tricking the eye" means_______.  filtering colours   playing a trick with an eye   projecting two different colours   performing a visual illusion        Q4.  According to paragraph 1, which of the following is NOT a true statement of 3-D movies?  3-D movies first appeared in the 20th Century.   3-D movies were already very popular when it was first shown.   The technology of 3-D movies has kept improving in the last 90 years.   3-D movies become more popular because of the increase in quality.

Which of the following statements is/are true?(i) A light field or plenoptic camera can refocus images after they are captured(ii) The sky is blue due to Compton scattering in the atmosphere(iii) RGB space is better for colour matching than UCS space

The clear sky appears as blue due to Only one correct answerA.Reflection of lightB.Atmospheric refractionC.Scattering of lightD.Absorption of light

Astronomers use filters when observing and imaging distant objects in space. These filters can be in any color of visible light as well as light that is invisible to human eyes. Each color of light can provide important information about the object that could not be seen otherwise. The image shows a series of 6 boxes with images of different sized cloudy, circles. The boxes are labeled radio, infrared, visible light, ultraviolet, x-rays, and gamma rays. The images in the first four boxes are similar in size and are all translucent. The image in the radio box has a bright ring near the center. The visible light box has bright areas throughout the cloud. The image in the x-rays box is slightly smaller and slightly opaque. The image in the gamma ray box is the smallest the brightest. The image above shows the Crab Nebula in several different wavelengths. The Crab Nebula is an example of what happens when a very large star explodes. Astronomers study events like these in as many different wavelengths of light as possible. Based on the image above, why do astronomers do this? Support your reasoning with three examples from the image above.