PLANCKS CONSTANT IN THE LIGHT OF AN INCANDESCENT LAMP

TASK 1

Draw the electric connections in the boxes and between boxes below.

TASK 2

a)

b)

We represent R_B in the vertical axis against I.

In order to work out R_B0 , we choose the first ten readings.

TASK 2

c)

Error for R_B (We work out the error for first value, as example).

We have worked out R_B0 by the least squares.

d)

Working out the error for two methods:

Method A

Method B

Higher value of a:

Smaller value of a: 

TASK 3

Because of 2Dl = 620 565 ; Dl = 28 nm

TASK 4

a)

b)

Because of 

For working out Dg we know that:

R DR 0.01 kW

R DR 0.01 kW

Transmittance, t  = 51.2 %

Working out the error for two methods:

Method A

Method B

Higher value of g

Smaller value of g

c)

d)

We work out the errors for all the first row, as example.

Error for R_B: 

Error for T: 

Error for R_B^-0.83 :

Error for lnR :

e)

We plot ln R versus R_B^-0.83 .

Because of

and

then