Luminophores

Luminophores can be:

• organic

• inorganic

• both

What is the source of energy for living organisms in bioluminescence ?

• synthesis that occurs in their body

• diet

• both

Fluorescence occurs when...

• A molecule returns to the electronic ground state from an excited triplet state by losing it's excess enrgy as a photon

• A molecule returns to the electronic ground state from an excited singlet state by losing it's excess enrgy as a photon

• A molecule lowers its vibrational energy by losing it's excess energy as a photon

Organisms in which bioluminescence occurs are:

• Algae, fireflies

• jellyfish, aardvark

• fungi, bat

Security features of banknotesare made withe the use of:

• Phosphorescence

• Fluorescence

• Both

The image we see on the screens of phones and TVs is in colour:

• white

• green

• yellow

The color temperature of a light bulb tells us:

• The higher the number the whiter the light

• The lower the number the whiter the light

• The higher the number the yellower the light

The luminescence colour of europium is

• red

• green

• blue

Neutral light is available in colour temperature:

• 2700-3500 K

• 4000-5000 K

• 5050-6000 K

What type of luminescence we used in the bulb stick ?

• chemiluminescence

• fluorescence

• phosphorescence