IB Physics SL 6.6.1 Concluding Question Bank

Practise IB Physics SL/HL 6.6.1 by applying concluding concepts to exam-style physics questions.

Exam points

identify the relevant physical quantity, model or diagram
apply the correct equation and units to the evidence
justify the result using conservation laws, fields or energy relationships

[Maximum number: 1]

A student investigates whether the Stefan-Boltzmann law, $L=4 \pi \sigma R^{2} T^{4}$ , applies to stars.
L= luminosity of the star, in W
$\sigma=$ Stefan-Boltzmann constant
R= radius of the star, in m
T= surface temperature of the star, in K
To verify the law, they obtain values from databases and manipulate the data as shown.

Table for Question S2.3.1—Concluding question 1 — IB Physics SL

Outline a conclusion for the investigation.

ALTERNATIVE 1

the linear graph suggests that SB applies to stars

ALTERNATIVE 2

the «accurate » calculation of $\sigma$ from the data suggests that SB applies to stars

ALTERNATIVE 3

« if 2c has a value of $\sigma$ that is not accurate » the calculation of the $\sigma$ from the data suggests SB does not apply to stars

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S2.3.1—Concluding question 1