Pinhole camera calculations

Why is the image in a pinhole camera inverted?

• Because your eye reverses it

• Because of the distance of the image from the aperture

• Because it isn't a real image

• Because light travels in a straight line

In this ray diagram, is the camera on the left or on the right?

• left

• right

• impossible to tell

• could be either

What does the point where the rays cross represent?

• How big the image is

• How big the photograph can be

• The aperture where the light enters the camera

• It is just a point in space where the light rays cross

What does d represent?

• How far to place the camera from the object you want to photograph

• How big the photograph can be

• The size of the camera

• The focal distance

What does f represent?

• How far to place the camera from the object you want to photograph

• How big the photograph can be

• The size of the camera

• The width of the photo paper

What does i represent?

• How far to place the camera from the object you want to photograph

• The height of the photo paper

• The size of the camera

• The width of the photo paper

You are using a pinhole camera to take a photo of a car. If you move your camera closer to the car, what will happen to the image on the film paper?

• It will get larger

• It will get smaller

• It will get clearer

• It will get fuzzier

You are using a pinhole camera to take a photo of a car. If you make the aperture smaller, what will happen to the image on the film paper?

• It will get larger

• It will get smaller

• It will get clearer

• It will get fuzzier

You are using a pinhole camera to take a photo of a car. If you adjust the film paper so it is closer to the aperture, what will happen to the image on the film paper?

• It will get larger

• It will get smaller

• It will get clearer

• It will get fuzzier

Which is the correct ray diagram for the following measurements?

focal distance of 6"

photo height of 4"

object to be photographed height of 10'

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