Natural Of light 2

A lens is used to record an image of an object. If a piece of paper covers half of the lens​

The full image will appear, but half as bright​

A lens is used to record an image of an object. If acircular ring is used to cut off the outer half of the lightentering the lens, but not the inner half​

The full image will appear, but half as bright​

To increase the amount of light entering thecamera by a factor of four, the aperture diametermust be increased by ​

2

Which of the following things were necessary to take this photograph?​

Fast shutter speed/short time exposure​

Which of the following things were necessary to take this photograph?​

Large aperture​

Which of the following things were necessary to take this photograph?​

Small aperture

Which of the following things were necessary to take this photograph?​

Slow shutter speed/long time exposure​

Which of the following things were necessary to take this photograph?​

Slow shutter speed​

The shorter the focal length

the wider the field of view it sees or the less magnification. ​

The longer the focal length

the smaller field of view so the more zoomed up it looks the more magnification. ​

Prime Lenses

 fixed focal length

Zoom Lenses

adjustable focal length

A slow shutter speed

can help you illuminate a darker scene, as it brings more light through the lens.

A faster shutter speed

the lens is open for a shorter length of time, so less light enters the lens. (use during daylight)

What is depth of field in photography?

the amount of the image that is in focus. Images with a shallow depth of field exhibit significant out-of-focus areas (blurred foreground and/or background), whereas images with a deep depth of field can have nearly everything in focus.

What affects depth of field?

the lens' aperture size and the size of the image sensor.

What is the effect of larger apertures on depth of field?

out of focus blurred background - main object in focus. will leave less of the image in focus, resulting in a shallow depth of field.

How do smaller apertures influence depth of field?

everything is in good resolution and leave more of an image in focus, resulting in a deeper depth of field.

How does sensor size affect depth of field?

Larger sensors make it easier to blur the foreground and/or background at a given aperture, while smaller sensors make it easier to achieve focus across the entire image at a given aperture.

Positive charge and negative charge

They attract each other.

Positive charge and positive charge

They repel each other.

Negative charge and negative charge

They repel each other.

Which arrow best represents the electric field at the center of the square?​

1

Which arrow best represents the electric field at the center of the square?​

5

Electric field lines:​

1. Point in the direction of the field vector at every point.​

2. Start at positive charges or infinity.​

3. End at negative charges or infinity.​

4. Are more dense where the field is stronger.