Thin Lens Equation - HP -22S Owner's Manual

Keys: Display: Description:
.1
SOLVE I
{T} K?value
Selects T, prompts for
K.
1.2
.mB
411NPUTI
N?value
Stores
K,
prompts for
N.
10.9
1 INPUT I
I
?value
Stores N, prompts for
I.
15.3
1 INPUT!
T=2,825.7503
Stores I, calculates T
(in years).
Part 2:
What will be the activity of a similar sample taken 500 years
in the future?
5
.1
SOLVE
I
{N}
[±]
500
I
INPUT I
K?0.0001
T?2,825.7503
T=3325.7503
I? 15.3000
N=10.2652
The Thin Lens Equation
Selects N.
I
SOLVE
I
will
use initial guesses
5
and 10.9 (values stored
in
N).*
Retains
K,
prompts for
T.
Adds 500 to previous
T, prompts for I.
Retains I, calculates N.
The thin lens equation applies to parallel light falling upon a spheri-
cal mirror or refracting surface:
1 1 1
- + - = -
i
0
f
• The guesses are necessary to prevent the LOG(NEG) error. See page 87 for additional in-
formation about entering guesses.
104 7: The Equation Library