Fluorescente

The video explains how certain materials absorb energy and re-emit it as light of a different wavelength. This phenomenon is particularly striking when materials absorb ultraviolet light, which is invisible to the human eye, and then emit it as visible light.

What happens to energy when it is absorbed by a material?

• It is emitted as light of a different wavelength.

• It is emitted as light of the same wavelength.

• It is stored permanently.

• It disappears completely.

Which type of light is absorbed by certain materials to create a spectacular effect?

• X-ray light

• Visible light

• Ultraviolet light

• Infrared light

What is the characteristic of ultraviolet light in relation to human vision?

• It is visible to the human eye.

• It is invisible to the human eye.

• It is partially visible to the human eye.

• It is only visible under special conditions.

In which spectrum range is the light emitted after absorbing ultraviolet light?

• Gamma spectrum

• Ultraviolet spectrum

• Visible spectrum

• Infrared spectrum

What is the result when materials emit light after absorbing ultraviolet light?

• The light is emitted in the visible spectrum.

• The light is emitted in the ultraviolet spectrum.

• The light is absorbed again.

• The light is not emitted at all.