An oscilloscope can be used for all of the following except:

An oscilloscope is a powerful instrument primarily designed for analyzing electrical signals. It excels at measuring voltage changes over time, allowing users to visualize how voltage levels fluctuate with respect to time, which is essential for understanding signal behavior in various circuits. Additionally, it effectively displays waveform shapes, providing real-time visualization of complex waveforms, including sine, square, and triangular waves, which is invaluable for engineers and technicians in assessing the performance of electronic devices.

However, measuring the velocity of light is outside the scope of the oscilloscope's functionalities. The velocity of light is a fundamental physical constant that can be measured using specific experimental setups involving time and distance, not through the analysis of electrical signals alone. Oscilloscopes do not have the means to measure or calculate this physical attribute directly, as their primary focus is on electrical signal analysis rather than physical properties unrelated to voltages and waveforms.

While testing circuit continuity is a function that can sometimes be facilitated indirectly if using an oscilloscope alongside other tools, it is not the primary intended use of the device. Therefore, option regarding measuring the velocity of light is the correct answer as the oscilloscope is not designed for such measurements.