« previous next »

Author Question: Halving the focal length of a telephoto lens, while holding aperture size constant, will change the ... (Read 84 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?

During the twentieth century, a variant of the metric system was used in Russia and France in which the base unit of mass was the tonne. Instead of kilograms, this system used millitonnes (mt).

Did you know?

The people with the highest levels of LDL are Mexican American males and non-Hispanic black females.

Did you know?

Bacteria have been found alive in a lake buried one half mile under ice in Antarctica.

Did you know?

Only 12 hours after an egg cell is fertilized by a sperm cell, the egg cell starts to divide. As it continues to divide, it moves along the fallopian tube toward the uterus at about 1 inch per day.

Did you know?

Amoebae are the simplest type of protozoans, and are characterized by a feeding and dividing trophozoite stage that moves by temporary extensions called pseudopodia or false feet.

Evolutionary change in the tetrapod lineage, showing a transitional form. Evolutionary change in the tetrapod lineage, showing a transitional form.
Stellar Size and Spectra Stellar Size and Spectra
The Solar Constant The Solar Constant
Two techniques for holding and inserting an otoscope Two techniques for holding and inserting an otoscope
The decay constant of radon-222 is 0.181 d-1. If a sample of radon initially contains 6.00 × ... The decay constant of radon-222 is 0.181 d-1. If a sample of radon initially contains 6.00 × ...
The focal lengths of the objective and the eyepiece in a microscope are 0.29 cm The focal lengths of the objective and the eyepiece in a microscope are 0.29 cm
Video: Neuron structure and function - sensory neurons, association neurons & motor neurons

For a complete list of videos, visit our video library