Physics, 03.09.2021 20:00 AutumnJoy12

You are observing a 20 cm-tall object in a pinhole camera (with a screen at the end like those you used in lab/recitation this week). The screen is 25 cm from the pinhole. The image on the screen is 5 cm tall. (Note: try to do this problem without a calculator since the calculations involved are the type you would be expected to be able to do on an exam without using a calculator.) 1. If you moved the screen farther from the the pinhole, the image on the screen would:

a. Stay in focus but decrease in size
b. stay in focus but increase in size
c. lose focus

2. If you were looking at two objects, one 50 cm from the pinhole and one 75 cm from the pinhole, which object would be in 'focus' on the screen?

a. Can't determine from the information
b. the 50 cm object would be in focus
c. both objects would be in focus
d. the 75cm object would be in focus

Answers: 1

Show answers

Another question on Physics

Physics, 22.06.2019 05:40

Unpolarized light of intensity i_0=750w/m^2 is incident upon two polarizers. after passing through both polarizers the intensity is i_2=280w/m^2. (a) what is the intensity of the light after it passes through the first polarizer in w/m^2? (b) write an equation for the angle between the polarizers in terms of the initial (i_0) and final (i_2) intensities. (c) find the angle between the polarizers in degrees.

Answers: 3

Answer

Physics, 22.06.2019 10:30

In automobile steering wheel is shown what is the ideal mechanical advantage blank? if the ama is eight what is the efficiency of the steering wheel?

Answers: 1

Answer

Physics, 22.06.2019 16:00

Marvin records scientific data about lake superior. for which property has marvin forgotten to use an si unit of measurement? shore length high temperature low temperature annual precipitation

Answers: 3

Answer

Physics, 22.06.2019 22:00

Aviolently rotating column of air is formed around a region of extremely low air pressure above land. which of these weather conditions is most likely to follow? blizzard cyclone tornado hurricane

Answers: 1

Answer

You know the right answer?

You are observing a 20 cm-tall object in a pinhole camera (with a screen at the end like those you u...

Questions