« previous next »

Author Question: Halving the focal length of a telephoto lens, while holding aperture size constant, will change the ... (Read 85 times)

rachel9

  • Sr. Member
  • ****
  • Posts: 495
on: Jul 28, 2018
Halving the focal length of a telephoto lens, while holding aperture size constant, will change the light intensity admitted to the film by what factor?
 a. 0.50
  c. 0.25
  b. 2.0
  d. 4.0

Question 2

Doubling the aperture diameter of a camera lens will change the light intensity admitted to the film by what factor?
 a. 4.0
  c. 0.50
  b. 0.25
  d. 2.0


C.mcnichol98

  • Sr. Member
  • ****
  • Posts: 314
Reply #1 on: Jul 28, 2018
Answer to Question 1

D

Answer to Question 2

A


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
« previous next »
 

Did you know?

Historic treatments for rheumatoid arthritis have included gold salts, acupuncture, a diet consisting of apples or rhubarb, nutmeg, nettles, bee venom, bracelets made of copper, prayer, rest, tooth extractions, fasting, honey, vitamins, insulin, snow collected on Christmas, magnets, and electric convulsion therapy.

Did you know?

Asthma cases in Americans are about 75% higher today than they were in 1980.

Did you know?

Interferon was scarce and expensive until 1980, when the interferon gene was inserted into bacteria using recombinant DNA technology, allowing for mass cultivation and purification from bacterial cultures.

Did you know?

People with high total cholesterol have about two times the risk for heart disease as people with ideal levels.

Did you know?

More than 2,500 barbiturates have been synthesized. At the height of their popularity, about 50 were marketed for human use.

Francis Thackeray holding Sterkfontein 5 (STS 5), a presumed female Australopithecus africanus. Francis Thackeray holding Sterkfontein 5 (STS 5), a presumed female Australopithecus africanus.
The metric system specifies fasteners by diameter, length, and pitch. The metric system specifies fasteners by diameter, length, and pitch.
Europe’s Size and Location Europe’s Size and Location
Passive touch by holding the feet lightly. Passive touch by holding the feet lightly.
Capital-Biased Technological Change Capital-Biased Technological Change
Kids holding hands in school Kids holding hands in school
Video: Fetal Development of the Cardiovascular System

For a complete list of videos, visit our video library