Topic 5 Extending Human Vision

Question 1

Near point of the eye

Answer 1

Shortest distance at which an object is in focus.

Question 2

Far point of the eye

Answer 2

The longest distance at which an object is in focus

Question 3

The type of lens in a human eye

Answer 3

Convex lens, which focuses the light rays entering your eye to a point on your retina

Question 4

Myopic

Answer 4

Near sightedness, eye is too long and the image forms in front of the retina, have trouble seeing distance objects (me)

Question 5

Hyperopia

Answer 5

Far sightedness, eye is too short, image forms behind the retina, have trouble seeing objects close

Question 6

What does LASER stand for

Answer 6

Light
Amplification by the
Stimulated
Emission of
Radiation or laser light.

Question 7

Refracting Telescopes

Answer 7

Light from a distant object is collected and focused by a convex lens called the objective lens.

A second lens, called the eyepiece lens, works as a magnifying glass to enlarge the image.

Question 8

Reflecting Telescopes

Answer 8

Uses a concave mirror to collect rays of light from a distant object. The mirror is called the primary or objective mirror. It forms a real image, which is then magnified by the eyepiece lens

Question 9

Binoculars

Answer 9

Two reflecting telescopes mounted side by side.
Telescopes that are shortened by placing glass blocks inside.
These glass blocks, called prisms, serve as plane mirrors.

Question 10

Microscopes

Answer 10

Modern compound light microscopes can magnify objects up to 2000×.
Compound microscopes have an objective lens that forms a real image of the object. Then an eyepiece lens magnifies the image further.

Question 11

Magnifying glass

Answer 11

A magnifying glass is a simple kind of microscope.

Magnifying glasses are used for magnifications up to about ten times actual size.