Direct sunlight should be avoided because it can cause reading errors due to heat. Which option best completes this statement?

Direct sunlight should be avoided because it can cause reading errors due to heat. Which option best completes this statement?

• A. It stabilizes readings due to heat.
• B. It has no effect on readings.
• C. It reduces energy consumption.
• D. It causes erroneous readings due to heat.

Answer: (D)

Direct sunlight can heat a measuring instrument, and many sensors are temperature dependent. When the device warms, its internal components drift, causing the readings to move away from the true value. Radiant heat can also create uneven temperatures across the sensing element, producing bias and lag in measurements. That’s why the statement should conclude that direct sunlight causes erroneous readings due to heat. The other options don’t fit because they imply effects that aren’t caused by heat in this context: stabilization from heat, no effect, or an unrelated change in energy use.

Direct sunlight can heat a measuring instrument, and many sensors are temperature dependent. When the device warms, its internal components drift, causing the readings to move away from the true value. Radiant heat can also create uneven temperatures across the sensing element, producing bias and lag in measurements. That’s why the statement should conclude that direct sunlight causes erroneous readings due to heat. The other options don’t fit because they imply effects that aren’t caused by heat in this context: stabilization from heat, no effect, or an unrelated change in energy use.