19 Ultraviolet
What do you call the area marked with '???'?
Infrared region
Ultraviolet region
Ultrared region
For us humans, visible light consists of wavelengths between 400 nanometres and 850 nanometres, the typical rainbow colors. Shorter wavelengths are found in the ultraviolet range and longer wavelengths form the infrared range.
For us humans, visible light consists of wavelengths between 400 nanometres and 850 nanometres, the typical rainbow colors. Shorter wavelengths are found in the ultraviolet range and longer wavelengths form the infrared range.
What does the picture of this flower taken with the UV camera look like?
The inner area of the flower is dark.
The flower appears completely black.
The flower appears completely white.
To the human eye, the dandelion flower appears all yellow. In the UV range (with the help of a special UV camera) the flower looks different on the outside than on the inside. Bees and other insects, for example, can perceive this.
To the human eye, the dandelion flower appears all yellow. In the UV range (with the help of a special UV camera) the flower looks different on the outside than on the inside. Bees and other insects, for example, can perceive this.
Which light sources emit UV light?
Black light lamps and the sun
The sun and conventional room lighting
Conventional room lighting and black light lamps
Conventional room lighting does not emit UV light. Special lamps such as black light lamps have been specially developed to emit UV light, also called black light. The sun serves as a natural source of UV light. It emits three types of UV radiation with different energies: UVA radiation, UVB radiation and UVC radiation.
Conventional room lighting does not emit UV light. Special lamps such as black light lamps have been specially developed to emit UV light, also called black light. The sun serves as a natural source of UV light. It emits three types of UV radiation with different energies: UVA radiation, UVB radiation and UVC radiation.
What color is this well-known drink for the human eye when it is irradiated with UV light?
Green
Blue
Transparent
Tonic water contains the molecule quinine, which can absorb UV light and convert it into blue light visible to us (fluorescence).
Tonic water contains the molecule quinine, which can absorb UV light and convert it into blue light visible to us (fluorescence).
This picture shows a powder that we use almost every day irradiated with a UV lamp. Which everyday powder is this?
Flour
Laundry powder
Sugar
This is laundry powder. It is mixed with fluorescent substances so that our laundry under the sunlight (which also contains UV light) appears slightly bluish fluorescent, thus whiter.
This is laundry powder. It is mixed with fluorescent substances so that our laundry under the sunlight (which also contains UV light) appears slightly bluish fluorescent, thus whiter.
This young woman is standing in front of a phosphorescent board. What can you see on the board when you irradiate both for a few seconds with UV light?
The silhouette of the woman
The skeleton of the woman
The board goes white
The phosphorescent board stores the energy of UV light for several seconds and slowly converts it into light visible for us humans. The young woman blocks the UV radiation on the board, so her shadow becomes visible.
The phosphorescent board stores the energy of UV light for several seconds and slowly converts it into light visible for us humans. The young woman blocks the UV radiation on the board, so her shadow becomes visible.
Here you can see one of the most well-known fluorescent dyes dissolving in water?
Aspirin
Fluorescein
Tourmaline
Fluorescein is used not only for aesthetic reasons but mainly for leakage finding in case of water damage. It is used by the ophthalmologist as well as in fishing.
Fluorescein is used not only for aesthetic reasons but mainly for leakage finding in case of water damage. It is used by the ophthalmologist as well as in fishing.
The following mineral (a calcium carbonate) is greenish under normal white light, but shows pink fluorescence under UV light. What is it called?
Amethyst
Aragonite
Emerald
Aragonite, among other things, regulates the pH value of the sea and is indispensable for many marine life forms. It is therefore considered essential for replication of reef conditions in aquariums.
Aragonite, among other things, regulates the pH value of the sea and is indispensable for many marine life forms. It is therefore considered essential for replication of reef conditions in aquariums.
This quiz was written by the Luxembourg Science Center in Differdange. Visit the Centre to learn more about ultraviolet and other scientific topics!
This quiz was written by the Luxembourg Science Center in Differdange. Visit the Centre to learn more about ultraviolet and other scientific topics!
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Images copyrights:
1 Luxembourg Science Center
2 Luxembourg Science Center
3 Luxembourg Science Center
4 Luxembourg Science Center
5 Luxembourg Science Center
6 Luxembourg Science Center
7 Luxembourg Science Center
8 Luxembourg Science Center
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10 Luxembourg Science Center
11 Luxembourg Science Center/Naturmusée
12 Luxembourg Science Center/Naturmusée
Images copyrights:
1 Luxembourg Science Center
2 Luxembourg Science Center
3 Luxembourg Science Center
4 Luxembourg Science Center
5 Luxembourg Science Center
6 Luxembourg Science Center
7 Luxembourg Science Center
8 Luxembourg Science Center
9 Luxembourg Science Center
10 Luxembourg Science Center
11 Luxembourg Science Center/Naturmusée
12 Luxembourg Science Center/Naturmusée
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