Mirrors, Lenses, and the Eye-7th

The image below shows rays reflecting off a convex mirror. Which best explains why an image in a convex mirror is never to the left of the mirror?

• The reflected rays meet at a single point.

• The incoming rays are reflected through the focal point.

• The incoming rays are absorbed by the mirror.

• The reflected rays never intersect.

Which best describes an image of an object in a convex mirror?

• upside down and smaller

• right-side up and smaller

• upside down and larger

• right-side up and larger

The image below shows the image of a candle formed by a curved mirror. What are the characteristics of the image if the candle is moved closer to the focal point?

• right-side-up and smaller

• right-side-up and larger

• upside down and smaller

• upside down and larger

The image below shows the image of a candle formed by a curved mirror. What are the characteristics of the image if the candle is moved to half-way between the focal point and the mirror?

• right-side-up and smaller

• right-side-up and larger

• upside down and smaller

• upside down and larger

What happens to the image of an object placed between the focal point and a concave mirror?

• Smaller and upside down

• Larger and upside down

• Upright and behind the mirror.

Tags

NGSS.MS-PS4-2

The image below shows the image of a candle formed by a curved mirror. What is observed if the candle is placed at the focal point?

• no image

• a horizontal image

• a double image

• an unclear image

The image below shows light rays passing through a lens. Which describes the image of an object that is less than one focal length from this lens?

• smaller and right-side-up

• smaller and upside down

• larger and upside down

• larger and right-side-up

The image below shows rays of light passing through the eye. Why does changing the shape of the cornea fix some vision problems?

• It changes the shape of the cornea from convex to concave.

• It changes the shape of the cornea from concave to convex.

• It changes the focal length of the cornea.

• It changes the transparency of the cornea.

The image below shows the pupil of the eye under dim and bright light. In some photos taken using a flash, the pupil can appear red, rather than black. Which best explains this observation?

• The pupil absorbs most of the light but reflects red.

• The flash irritates the pupil causing it to turn red in color.

• The red blood vessels in the retina absorb most of the white light of the flash and reflect red.

• The pupil gets larger and reflects red light.

Tags

NGSS.MS-LS1-8

Which best explains the color observed when a blue light shines on a red shirt?

• The shirt appears purple because blue and red blend to reflect purple.

• The shirt appears blue because the blue light is reflected.

• The shirt appears black because the blue light is absorbed, and no light is reflected.

• The shirt appears red because blue is absorbed and red is reflected.

Tags

NGSS.MS-PS4-2