This topic contains a solution. Click here to go to the answer

Author Question: I take two pictures of my dog Kaycee. I use the same film and level of illumination for both ... (Read 74 times)

Ebrown

  • Hero Member
  • *****
  • Posts: 567
I take two pictures of my dog Kaycee. I use the same film and level of illumination for both pictures, but I halve the f-number for the second picture. By what factor will the required time of exposure change if the film is to receive the same total light energy?
 a. 4.0
  c. 2.0
  b. 0.50
  d. 0.25

Question 2

Doubling the f-number of a camera lens will change the light intensity admitted to the film by what factor?
 a. 1/4
  c. 1/2
  b. 4
  d. 2



Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

jjorrostieta

  • Sr. Member
  • ****
  • Posts: 298
Answer to Question 1

D

Answer to Question 2

A




Ebrown

  • Member
  • Posts: 567
Reply 2 on: Jul 28, 2018
Great answer, keep it coming :)


juliaf

  • Member
  • Posts: 344
Reply 3 on: Yesterday
Gracias!

 

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?

On average, someone in the United States has a stroke about every 40 seconds. This is about 795,000 people per year.

Did you know?

Dogs have been used in studies to detect various cancers in human subjects. They have been trained to sniff breath samples from humans that were collected by having them breathe into special tubes. These people included 55 lung cancer patients, 31 breast cancer patients, and 83 cancer-free patients. The dogs detected 54 of the 55 lung cancer patients as having cancer, detected 28 of the 31 breast cancer patients, and gave only three false-positive results (detecting cancer in people who didn't have it).

Did you know?

Tobacco depletes the body of vitamins A, C, and E, which can result in any of the following: dry hair, dry skin, dry eyes, poor growth, night blindness, abscesses, insomnia, fatigue, reproductive system problems, sinusitis, pneumonia, frequent respiratory problems, skin disorders, weight loss, rickets, osteomalacia, nervousness, muscle spasms, leg cramps, extremity numbness, bone malformations, decayed teeth, difficulty in walking, irritability, restlessness, profuse sweating, increased uric acid (gout), joint damage, damaged red blood cells, destruction of nerves, infertility, miscarriage, and many types of cancer.

Did you know?

Women are two-thirds more likely than men to develop irritable bowel syndrome. This may be attributable to hormonal changes related to their menstrual cycles.

For a complete list of videos, visit our video library