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Grade 10 Science > Optics > Flashcards

Optics Flashcards

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1
Q

What is light?

A

A type of electromagnetic radiation

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2
Q

What is electromagnetic radiation?

A

A type of energy made up of waves that travel all around us

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3
Q

What is the law of rectilinear propagation?

A

A law that says that light usually only travels in a straight line

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4
Q

What is a unit of light called?

A

A photon

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5
Q

How do the sun and the stars make light?

A

The electrons in their atoms heat up and jump to bigger orbits. When they eventually cool down and return to their original orbit, they emit light

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6
Q

What determines the color of these photons?

A

How large the jump between the orbits was. The bigger the jump, the higher the energy

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7
Q

Does light act as a particle or wave?

A

It can act as both

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8
Q

What does ROYGBIV mean?

A

Its an acronym that shows the different wavelengths of colors from longest to shortest

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9
Q

What can happen to light when it passes through materials?

A

It can either be absorbed, transmitted, or reflected

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10
Q

What are the 3 additive primary colors?

A

Red, green, blue

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11
Q

What are the three secondary colors?

A

magenta: red+blue
yellow: red+green
cyan: blue+green

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12
Q

What does it mean when an object is translucent?

A

It transmits some light

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13
Q

What does it mean when an object is transparent?

A

it transmits all light

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14
Q

What does it mean when an object is opaque?

A

it transmits no light

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15
Q

What is the electromagnetic spectrum?

A

All the different types of waves arranged according to their wavelengths

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16
Q

What makes white light?

A

When red, green, and blue are mixed

17
Q

If magenta and cyan are mixed, which color will be reflected?

A

Blue, because they both have blue in common

18
Q

If magenta and yellow are mixed, which color is reflected?

A

Red

19
Q

How is black formed?

A

When red, blue, and green are mixed, it will absorb all 3 primary colors of light, making it look black

20
Q

What is subtractive theory?

A

How White light light is absorbed and reflected off coloured surfaces

21
Q

What is a concave lens?

A

A lens that diverges light rays from a focal point

22
Q

What is a convex lens?

A

A lens that converges light rays from a focal point

23
Q

What is a concave mirror?

A

A mirror that curves inwards

24
Q

What is a convex mirror?

A

A mirror that curve outward

25
Q

What is the pupil?

A

The black part of the eye that allows light to enter the eye

26
Q

What is the iris?

A

The colored muscle that controls the size of the pupil

27
Q

What is the sclera?

A

The white of the eye which maintains size and form and is attached to the muscles of the eye

28
Q

What is the cornea?

A

The coating of the eye that covers the pupil and iris

29
Q

What is the lens?

A

A transparent disc shaped converging lens located behind the opening of the pupil

30
Q

What is the vitreous humor?

A

A transparent jelly fluid which makes up most of the eye

31
Q

What is the retina?

A

The inner layer of the eye which contains rods and cones

32
Q
A

Grade 10 Science (4 decks)

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