« previous next »

Author Question: Halving the focal length of a telephoto lens, while holding aperture size constant, will change the ... (Read 76 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?

Malaria was not eliminated in the United States until 1951. The term eliminated means that no new cases arise in a country for 3 years.

Did you know?

Adults are resistant to the bacterium that causes Botulism. These bacteria thrive in honey – therefore, honey should never be given to infants since their immune systems are not yet resistant.

Did you know?

Vampire bats have a natural anticoagulant in their saliva that permits continuous bleeding after they painlessly open a wound with their incisors. This capillary blood does not cause any significant blood loss to their victims.

Did you know?

Alcohol acts as a diuretic. Eight ounces of water is needed to metabolize just 1 ounce of alcohol.

Did you know?

The ratio of hydrogen atoms to oxygen in water (H2O) is 2:1.

Size varies greatly among horse breeds, as with this full-sized horse and a miniature horse. Size varies greatly among horse breeds, as with this full-sized horse and a miniature horse.
Small nuclear RNAs (snRNA), 100-200 bp in length, form part of the splicing mechanisms to process mR Small nuclear RNAs (snRNA), 100-200 bp in length, form part of the splicing mechanisms to process mR
How to find the constant (C) after finding the anti-derivative How to find the constant (C) after finding the anti-derivative
Climate Change: Greenhouse gases Timescale Climate Change: Greenhouse gases Timescale
Relative Humidity Changes at Constant Water-Vapor Content Relative Humidity Changes at Constant Water-Vapor Content
A ship is being pulled through a harbor at constant velocity by two tugboats as shown in the ... A ship is being pulled through a harbor at constant velocity by two tugboats as shown in the ...
Video: Stimulus (introduction)

For a complete list of videos, visit our video library