« previous next »

Author Question: Halving the focal length of a telephoto lens, while holding aperture size constant, will change the ... (Read 37 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?

When blood is exposed to air, it clots. Heparin allows the blood to come in direct contact with air without clotting.

Did you know?

Allergies play a major part in the health of children. The most prevalent childhood allergies are milk, egg, soy, wheat, peanuts, tree nuts, and seafood.

Did you know?

Fungal nail infections account for up to 30% of all skin infections. They affect 5% of the general population—mostly people over the age of 70.

Did you know?

Blood in the urine can be a sign of a kidney stone, glomerulonephritis, or other kidney problems.

Did you know?

People who have myopia, or nearsightedness, are not able to see objects at a distance but only up close. It occurs when the cornea is either curved too steeply, the eye is too long, or both. This condition is progressive and worsens with time. More than 100 million people in the United States are nearsighted, but only 20% of those are born with the condition. Diet, eye exercise, drug therapy, and corrective lenses can all help manage nearsightedness.

The Speed of Light Is Constant The Speed of Light Is Constant
Suture Use, Size, and Type of Material Suture Use, Size, and Type of Material
This 19-year-old in Wisconsin was given a reduced jail sentence for holding this sign in front of ... This 19-year-old in Wisconsin was given a reduced jail sentence for holding this sign in front of ...
Nursing Interventions and Prochaska's Stages of Change Nursing Interventions and Prochaska's Stages of Change
Apply friction to tendons at the elbow with thumb or fingers. Add stripping effleurage along length ... Apply friction to tendons at the elbow with thumb or fingers. Add stripping effleurage along length ...
Suppose the market supply curve is p = 5Q. If price increases from 10 to 15, the change in ... Suppose the market supply curve is p = 5Q. If price increases from 10 to 15, the change in ...
Video: Angiotensin II - kidneys, adrenal glands and dehydration

For a complete list of videos, visit our video library