IB Physics SL Extended Essay Example

The student defines a clear and experimentally manageable topic.

The student's research question is explicit, quantitative, and directly answerable.

The student's procedure includes repeated trials, controls, and a sensible experimental setup.

Some method details that affect reliability are missing, such as calibration and justification for the short reading time.

The question could be sharper if it stated the fixed measurement conditions more explicitly.

A few parts of the topic discussion are broader than needed for the investigation.

The student shows sound understanding of the lamp, its physical behavior, and the key ideas needed to explain the results.

The student uses a range of relevant terminology appropriately, including illuminance, resistance, uncertainty, and logarithmic linearization.

The student demonstrates a relevant distinction between total radiant output and visible-light-related measurement.

Some photometric language is imprecise, especially where illuminance is described as being emitted rather than measured at the detector.

A few unit and notation choices are inaccurate or inconsistent.

Some theoretical explanations are sound in direction but not consistently precise or fully connected to the actual measurement.