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Science Test > Light > Flashcards

Light Flashcards

0
Q

How does light travel

A

Light travels in straight lines

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1
Q

What is light

A

Light is a form of energy

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2
Q

What happens when an object absorbs light

A

The energy is transferred into heat and the object heats up

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3
Q

How would you show that light travels in straight lines

A

You would need 3 pieces of card, a light source, and your eyes. Put a hole in the centre of each piece of card so the holes are exactly aligned and then set them up in a straight line in front of the light source.

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4
Q

How fast does light travel

A

300,000 km per second

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5
Q

Does light travel faster than sound

A

Yes, sound travels 340 m/s (1 million times faster)

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6
Q

What is an example of light traveling faster than sound

A

Thunder and lightning

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7
Q

Transparent

A

You can see through it

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8
Q

Opaque

A

Prevent light through it fully

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9
Q

Translucent

A

Allows some light through

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10
Q

Reflect

A

Bounces light back

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11
Q

Absorb

A

Takes in something e.g. Energy

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12
Q

Polychromatic

A

Produces light in all colours

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13
Q

What are the colours of the rainbow

A

Red, orange, yellow, green, blue, indigo, violet

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14
Q

Why are shadows formed

A

Shadows are formed because light travels in straight lines

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15
Q

How is a solar eclipse formed

A

It’s formed when the moon blocks the light from the sun over earth

16
Q

What is a luminous object

A

A luminous object makes and gives off light

17
Q

Give an example of a luminous object

A

The sun

18
Q

What are non-luminous objects

A

Non luminous objects do not make their own light, they reflect light from another source

19
Q

What is dispersion of light

A

Dispersion of light is the spreading of light into different colours

20
Q

What is a converging or convex lens

A

A lens that bends the light into a point

21
Q

What’s a diverging or concave lens

A

A lens that bends the light outward

Science Test (4 decks)

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