AQA A Level Physics 3.2.2.2 Collisions of electrons with atoms

In a fluorescent tube, electrons are emitted from the:

• Cathode

• Anode

• Mercury vapour

• Phosphur coating

In a fluorescent tube, fired electrons interact with:

• Electrons in mercury atoms

• Electrons in phospor atoms

• UV photons

• Visible light photons

In a fluorescent tube, the atomic electrons in mercury:

• absorb energy from the fired electrons

• emit energy to the fired electrons

• absorb photons from from the fired electrons

• react with the phosphor coating

In a fluorescent tube, the atomic electrons in mercury are:

• excited by the fired electrons

• de-excited by the fired electrons

• react with the fired electrons

• react with the phosphor coating

In a fluorescent tube, the atomic electrons in mercury:

• de-excite

• excite

• react

• glow

In a fluorescent tube, the atomic electrons in mercury:

• emit UV photons

• emit visible light photons

• absorb UV photons

• absorb visible light photons

In a fluorescent tube, the UV photons are:

• emitted as atomic electrons in mercury de-excite

• adsorbed as atomic electrons in mercury de-excite

• emitted as atomic electrons in phosphor de-excite

• adsorbed as atomic electrons in phosphor de-excite

In a fluorescent tube, the UV photons are:

• emitted by atomic electrons in phosphor as they excite

• emitted by atomic electrons in phosphor as they de-excite

• absorbed by atomic electrons in phosphor as they de-excite

• absorbed by atomic electrons in phosphor as they excite

In a fluorescent tube, the atomic electrons in the phosphor coating:

• de-excite

• excite

• react

• glow

In a fluorescent tube, the visible light photons are:

• emitted as atomic electrons in phosphor de-excite

• adsorbed as atomic electrons in phosphor de-excite

• emitted as atomic electrons in mercury de-excite

• adsorbed as atomic electrons in mercury de-excite