are. Explain the

(1)

CAMPUS MÜNcHEN

phorms educåtion

2) Explain what

emission

and

absorption spectra

are. Explain the

difference between the emission spectra of gasses and solids.

3)

Calculate energy of the founh energy level

(r :4)

_in_Hydrogen.

4)

Calculate the energy of the photon that is emitted, when the electron in the fourth energy level jumps to the ground state.

5)

What is the ionization energy of Hydrogen?

6)

Consider light

with

a frequency

of

4.5

x

^7014H2.Calculate the energy

of

each photon. Hint:

Planck's constant

is

4.136

x

10-1s

eV'

s.

7)

The energy

of

a photon

from

a green laser

is2.4

eY, which corresponds

to

3.7

x 10-1e

J.

Consider a green laser with a power

of

15 W. How many photons does this red laser emit each second, assuming that the efficiency of the laser is 20 %?

8)

^What^is^thedefinition

of I

eV?

9)

Write out the nuclear reactions below by adding ø-particles, B-particles or

/-rays.

^Remember the electron antineutrino in the case of beta decay.

'llpu -'ltl.^+

'81¡^ - ^2!lNp+

'|lpu ^-.'}trpu+

'|lPu -'32u*

'32u -'33rn+

'33rn -'33nu+

t0)

2!$na is an unstable isotope

of

Radium that decays into and isotope

of

Radon (Rn) by alpha decay. Calculate

A

and Z for the daughter nucleus.

l1)

Take a look at the diagram in Figure 1 below:

10

0

I

6

4

2 o() Ef,

ã

o

orl) (Jf, Ê

o)o.

hd (¡,

o

Þo

ã

iñ

ô

100

¹⁵⁰

Nucleon number A

X'igure 1: The binding energy per nucleon.

2oo

a)

How can the diagram be used to understand the ^processesof fission and fusion?

b)

^Usethe diagram above to estimate the total binding energy

of 2]!U

c)

^Usethe diagram to estimate the energy released in the alpha decay

of

'â3p^ from ^exercise 9 above.

3

1

q _7^

ááFe äãAs

fe _Eu

3o 8i

153

63 209

90- B3 AoLr

238..

szu Zc

1Fl

t33sn

?o

iéK

tl*

6.

3L

are. Explain the

2) Explain what

and

are. Explain the

3)

(r :4)

4)

5)

6)

with

of

x

of

is

x

eV'

7)

of

from

is2.4

to

x 10-1e

of

8)

of I

9)

/-rays.

'llpu -'ltl.^+

'81¡^ - 2!lNp+

'|lpu -.'}trpu+

'|lPu -'32u*

'32u -'33rn+

'33rn -'33nu+

t0)

of

of

A

l1)

I

ã

ã

100

a)

b)

of 2]!U

c)

of

tl*

ln

'81¡^ - ^2!lNp+

'|lpu ^-.'}trpu+