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Science > Optics > Flashcards

Optics Flashcards

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1
Q

What lense can correct myopia

A

Concave

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2
Q

Light passes thought this type of lens is converges to the center

This type lens produces an image upside down and enlarged

Like the lens in your eye

A

Convex

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3
Q

What is optics

A

Study of light and tools that use light

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4
Q

What is the lens in your eye and in. Cameras used for

A

To go as an image

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5
Q

What are three optic tools?

A

Glasses, contacts, and telescope.

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6
Q

Mirrors use what type of reflection?

A

Regular

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7
Q

What is the law of reflection?

A

It states that the angle of reflection equals the angle of incidence.

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8
Q

What is regular reflection?

A

The reflection of parallel light rays in all the same direction

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9
Q

What is diffuse reflection?

A

The reflection of parallel light rays in many different directions.

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10
Q

What determines how mirrors form images

A

The shape

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11
Q

A virtual image

A

A right side up image

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12
Q

What is a real image

A

An upside down image

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13
Q

What is a plane mirror? How does it reflect images? Are they larger or smaller?

A

A plane mirror. It reflects image appears exactly like the object. They the same size.

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14
Q

What is a convex mirror? How does it reflect images?

A

It is curved outward. And reflects images to look smaller.

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15
Q

What is a concave lens? How does it reflect pictures ?

A

It is curved inward.

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16
Q

What is a focal point?

A

The point where light rays meet.

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17
Q

How do lens form images?

A

By refracting light.

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18
Q

How does refraction occur when light goes though a medium?

A

The light keeps going forward in a slightly different direction.

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19
Q

How do light waves travel relative to the normal from a less dense medium to a Denser medium?

A

The Denser object will redact more light.

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20
Q

How do light waves travel relative to the norm from a denser medium to a less dense medium?

A

A less dense object refracts less light.

21
Q

How is a rainbow formed?

A

By refraction and reflection of light though spherical water droplets that act as prisms

22
Q

What determines how lenses are formed?

A

The shape

23
Q

What is a convex lens

A

It is curved outward

24
Q

What is a concave lens

A

It is curved inward.

25
Q

What does optical technology make use of ?

A

Light waves

26
Q

Can lenses and mirrors and lenses be combined to make more powerful optical tools?

A

Yes

27
Q

What is an eyepiece and what does it do?

A

It is the other microscope lens that you look though . It is used to look at the image formed by the objective

28
Q

What is the objective lens and what does it do?

A

It is like a magnifying glass

29
Q

What does a lamp do?

A

It shines more light on an object.

30
Q

What do the reflecting and refracting telescope have in common ?

A
  • must adjust for he small amount of light received from distant objects
  • the amount of light can be increased by increasing the diameter of the objective lens or mirror.
31
Q

How are reflecting and refracting telescopes different?

A

Reflecting telescopes have no objective lens

32
Q

How does a camera work?

A

It has a convex lens. The Image forms on the film. The images are reduced and upside down. It is a real image.

33
Q

What is a laser?

A

A devise that produces an intense concentrated beam of light that is brighter than sun light.

34
Q

What is needed to make laser light?

A

An optical cavity

35
Q

What are three uses of lasers?

A

Measure great distances and angles

Read barcode

Holograms

36
Q

What are fiber optics

A

The technology biased on the use of laser light to send signals through transparent wire.

37
Q

What are the uses of fiber optics.

A

Communication, medicine,

38
Q

How and why is diffused light used in photography.

A

It produces a softer appearance than direct light because it spreads light in many directions.

39
Q

What is a natural optical tool?

A

The eye

40
Q

How does the light gather and focus light?

A

The eye transmit light, refracts light, and respond to different wavelengths of light. Contains natural lenses that focus objects.

41
Q

What is astigmatism ?

A

a type of refractive error of the eye

42
Q

What is glaucoma

A

eye disease in which the optic nerve is damaged in a characteristic pattern

43
Q

Cateracts

A

A cataract is a clouding of the lens inside the eye which leads to a decrease in vision.

44
Q

Cateract sergery

A

the removal of the natural lens of the eye

45
Q

Presbyopia

A

a condition in which the lens of the eye loses its ability to focus, making it difficult to see objects up close.

46
Q

Hyperopia

A

Farsightedness is greater difficulty seeing near objects than distant objects

47
Q

Myopia

A

a vision condition in which close objects are seen clearly, but objects farther away appear blurred.

48
Q

Iris

A

The colored disk around the pupil.

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