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Science > Optics/Physics > Flashcards

Optics/Physics Flashcards

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1
Q

How fast does light travel ?

A

300,000,000 mps

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2
Q

What is the relationship between the angle of incidence and the angle of reflection ?

A

The angle of incidence equals the angle of reflection

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3
Q

What are the colours of the visible spectrum ?

A

Red,Orange,Yellow,Green,Blue,Indigo and Violet
(ROY G BIV)

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4
Q

What is it called when light changes direction through a new medium ?

A

Refraction

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5
Q

What are the two lenses called ?

A

Concave and Convex

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6
Q

What does the cornea do ?

A

The cornea is a clear protective layer at the front of the eye that also refracts light

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7
Q

What does the retina do ?

A

The Retina is a light sensitive layer that converts light to electrical impulses

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8
Q

What does the lens do ?

A

The lens focuses light on the retina

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9
Q

What does the pupil do ?

A

The pupil is a hole at the front of your eye which allows light to enter

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10
Q

What does the iris do ?

A

The iris is a coloured muscle that alters the size of the pupil

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11
Q

What does the optic nerve do ?

A

The optic nerve carries electrical impulses from the retina to the brain

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12
Q

What lens corrects long sightedness ?

A

The convex lens

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13
Q

What lens corrects short sightedness ?

A

The concave lens

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14
Q

How many applications of light can you name ?

A

Telescope, Microscope, Light bulb, Cats eyes, Periscope.

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15
Q

Can you name the longest too shortest waves of the electromagnetic spectrum ?

A

Radio, Microwave, Infrared, Visible, UV, X-Ray and Gamma Ray

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16
Q

What is the most dangerous part of the electromagnetic spectrum ?

A

The Gamma Ray
(Carcinogenic to cells(Cancer))

17
Q

What is the safest part of the electromagnetic spectrum ?

A

Radio Waves

18
Q

What is the function of the microwave

A

To heat/make food

19
Q

What is the function of the infrared ray ?

A

Mobile phones, TV Remotes etc

20
Q

What is the function of the UV Ray ?

A

To reveal fraudulent money

21
Q

What is the function of the Radio Wave ?

A

To contact people on/listen to the radio

22
Q

What is the function of the visible Ray ?

A

Let’s us see

23
Q

What is the function of the X-Ray ?

A

To see/detect/fix broken bones

24
Q

What is the function of the Gamma Ray ?

A

Used to treat cancer/ used for radio therapy

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