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Science 2021-2022 > Light & Optics > Flashcards

Light & Optics Flashcards

1
Q

The distance from crest to crest or trough to trough.

A

Wavelength

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2
Q

The height of a wave crest or depth of a wave trough, as measured from the rest position.

A

Amplitude

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3
Q

Has energy, can be seen, and is all the colours of the rainbow.

A

Visible Light

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4
Q

The bending or changing direction of a wave as it passes from one material to another.

A

Refraction

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5
Q

Occurs when a light wave strikes an object & bounces off.

A

Reflection

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6
Q

The waves carry energy, & most waves are invisible. We need the spectrum & use it every day.

A

Electromagnetic Spectrum

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7
Q

Used in radios. Has the lowest energy & longest wavelength compared to all other types of EM waves.

A

Radio Waves

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8
Q

Used in microwaves. Has the shortest wavelength & highest energy of all the radio waves.

A

Microwaves

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9
Q

Used in heat lamps. Has a longer wavelength, lower energy, and lower frequency compared to light.

A

Infrared Waves

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10
Q

Can come from the sun. Compared to light, it has a shorter wavelength, higher energy, & higher frequency. It can help you get Vitamin D, but can also give you a sunburn.

A

Ultraviolet Waves

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11
Q

Used to X ray bones. Compared to UV waves, it has a much shorter wavelength, higher frequency, & higher energy.

A

X rays

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12
Q

This type of material allows light to pass through it freely. We can see through this type of material easily.

A

Transparent

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13
Q

This type of material allows most light rays to get through, but scatters them in all directions. We can see through this type of material, but what we see appears blurry.

A

Translucent

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14
Q

This type of material prevents any light from passing through it. We cannot see through this type of material.

A

Opaque

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15
Q

The incoming ray in a light diagram.

A

Incident Ray

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16
Q

The ray that bounces off the barrier in a light diagram.

A

Reflected Ray

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17
Q

An imaginary line that is perpendicular to the barrier in a light diagram. It is used to help explain how waves reflect.

A

Normal Ray

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18
Q

A mirror which has a reflecting surface that curves inward like the inside of a bowl or sphere. They are used for makeup as they make the reflected image look bigger than it actually is.

A

Concave Mirror

19
Q

A mirror that is curved outward, like the outside of a bowl or sphere. They are used for school bus mirrors, as they can give a wider view of the surrounding environment

A

Convex Mirror

20
Q

What are the colours of the visible light portion of the EM spectrum, listen from longest wavelength to shortest wavelength?

A

Red, Orange, Yellow, Green, Blue, Indigo, Violet

21
Q

How to convert watts to kiloWatts?

A

Divide by 1000

22
Q

How to find the kiloWatt hour?

A

Multiply kiloWatts by the number of hours

23
Q

White light is comprised of what?

A

All the colours of the rainbow

24
Q

The colour of an opaque object is determined by what?

A

The colour of light that it reflects

25
Q

Three additive primary colours

A

Red, blue & green

26
Q

What happens when you combine the three additive primary colours?

A

You get white

27
Q

Combining an additive red and green make what colour?

28
Q

Combining an additive green and blue make what colour?

29
Q

Combining an additive red and blue make what colour?

30
Q

The cell that detects light and dark changes.

31
Q

The cell that detects colour.

A

Cone Cells

32
Q

When your cones become defective, thus making it difficult to see colours

A

Colour Blindness

33
Q

Complementary colours of yellow

A

Red and green

34
Q

Complementary colours of cyan

A

Green and blue

35
Q

Complementary colours of magenta

A

Red + blue

36
Q

Light is made up of what?

37
Q

TV remotes use what kind of EM radiation?

A

Infrared waves

38
Q

What is formed when a material blocks light?

39
Q

Name all types of EM radiation from longest wavelength to shortest wavelength.

A

Radio waves, microwaves, infrared rays, visible light, ultraviolet rays, x rays, and gamma rays

40
Q

The type of light that is produced from heat

A

Incandescent light

41
Q

The type of light that is produced from phosphor particles that are hit by ultraviolet rays

A

Fluorescent light

42
Q

The type of light that is produced from living organisms

A

Bioluminescent light

43
Q

The type of light that is produced similarly to that of fluorescent light, but the light source stores the light for a long time before actually emitting it

A

Phosphorescent light

44
Q

The law of reflection states what?

A

When a ray of light reflects off of a smooth surface, the angle of incidence is equal to the angle of reflection

Science 2021-2022 (6 decks)

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