You can see the colours of the rainbow for yourself by sending a ray of white light into a glass prism. (A prism is a triangular glass block.) When the light enters the prism it bends – it is refracted. It also bends as it leaves the prism. Something else happens. The white light is split up into a spectrum of colours. They are the same colours as you see in a rainbow. The splitting up of white light into separate colours is called..
Đáp án
You can see the colours of the rainbow for yourself by sending a ray of white light into a glass prism. (A prism is a triangular glass block.) When the light enters the prism it bends – it is refracted. It also bends as it leaves the prism. Something else happens. The white light is split up into a spectrum of colours. They are the same colours as you see in a rainbow. The splitting up of white light into separate colours is called.
dispersion
.
Giải thích
The correct answer
dispersion
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What is a prism?
a transparent object that separates white light
a translucent object
an opaque object that appears black
none are correct
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a transparent object that separates white light
a translucent object
an opaque object that appears black
none are correct
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What are the primary colours of light?
red, yellow, blue
red, blue, purple
green, blue, yellow (result)
red, green, blue
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red, green, blue
red, blue, purple
red, yellow, blue
green, blue, yellow (result)
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Because a spectrum appears when light passes through a, some people imagined that it was the glass that gave the colours to the light. Isaac Newton realised that this was incorrect. He showed that white light (such as light from the Sun) is a mixture of all the diff erent colours of the spectrum.
Đáp án
Because a spectrum appears when light passes through a
glass prism
, some people imagined that it was the glass that gave the colours to the light. Isaac Newton realised that this was incorrect. He showed that white light (such as light from the Sun) is a mixture of all the diff erent colours of the spectrum.
Giải thích
The correct answer
glass prism
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reflection
reflection
the least
the least
the most
the most
refraction
refraction
Dispersion happens because of
. When white light enters a block of glass, some colours bend more than others. Violet bends
, red
.
This means that the diff erent colours travel off in diff erent directions, and so we can see them separately.
Giải thích
The correct answer
Dispersion happens because of
refraction
. When white light enters a block of glass, some colours bend more than others. Violet bends
the most
, red
the least
. This means that the diff erent colours travel off in diff erent directions, and so we can see them separately.
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Which of the following lists the 7 colours of the visible spectrum from shortest to longest wavelength?
Red, Yellow, Orange, Blue, Green, Indigo, Purple
Violet, Indigo, Blue, Green, Yellow, Orange, Red
Violet, Indigo, Black, Brown, Yellow, Orange, Red
Red, Orange, Yellow, Green, Blue, Indigo, Violet
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Violet, Indigo, Blue, Green, Yellow, Orange, Red
Red, Orange, Yellow, Green, Blue, Indigo, Violet
Violet, Indigo, Black, Brown, Yellow, Orange, Red
Red, Yellow, Orange, Blue, Green, Indigo, Purple
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The colours of the spectrum always appear in the same order: red - orange - yellow - green - blue - indigo and(Indigo is a dark blue-purple colour.) Although we say there are seven colours in the spectrum, there are no dividing lines where one colour changes to the next. The colour changes gradually from one shade to the next.
Đáp án
The colours of the spectrum always appear in the same order: red - orange - yellow - green - blue - indigo and
violet
(Indigo is a dark blue-purple colour.) Although we say there are seven colours in the spectrum, there are no dividing lines where one colour changes to the next. The colour changes gradually from one shade to the next.
Giải thích
The correct answer
violet
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When something looks yellow, ______.
yellow light is reflected and other colors are absorbed
yellow light is absorbed
none are correct
only yellow light makes up that object
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yellow light is reflected and other colors are absorbed
yellow light is absorbed
only yellow light makes up that object
none are correct
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What is NOT a color of the visible spectrum?
Green
Pink
Orange
Red
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Pink
Red
Orange
Green
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Why do we see objects as black?
They absorb some light and reflect
They absorb all the light
They reflect all the light
No reasons
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They absorb all the light
No reasons
They reflect all the light
They absorb some light and reflect
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The part of the electromagnetic spectrum that humans see is _____
x-ray.
infrared light.
visible light.
ultraviolet light.
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The correct answer
visible light.
x-ray.
ultraviolet light.
infrared light.
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