Author: eduKate Asia
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PSLE Science Reality Lab Vol No.336 | “HEPA: 99.97% at 0.3 µm” — Is 0.3 µm the Smallest Particle It Can Catch?
PSLE Science Reality Lab: learn why the famous HEPA 99.97% at 0.3 µm figure describes a defined filter test point, not a smallest particle size, and why whole-device performance still depends on airflow, leakage and use conditions.
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PSLE Science Reality Lab Vol No.335 | “This Satellite Image Is Bright Red” — Is the Forest Really Red?
PSLE Science Reality Lab: learn how false-colour satellite images map measured wavelength bands into display colours, so a red forest can be scientifically meaningful without literally being red to the eye.
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PSLE Science Reality Lab Vol No.334 | “UL Listed” — Does That Mean the Product Can Never Fail or Be Unsafe?
PSLE Science Reality Lab: learn how to read a UL Listed or Certified mark as evidence of conformity to specified certification requirements, not a guarantee that every product can never fail under every condition.
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PSLE Science Reality Lab Vol No.333 | “This Paper Has a Correction” — Does That Mean the Whole Study Is Invalid?
PSLE Science Reality Lab: learn how to read a scientific correction notice by checking exactly what changed, whether the conclusions changed, and how a correction differs from a retraction.
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PSLE Science Reality Lab Vol No.332 | “This Study Was Preregistered” — Does That Mean the Result Must Be Correct?
PSLE Science Reality Lab: learn how preregistration makes a study plan visible before results are known, while leaving method quality, execution, analysis and conclusion strength to be evaluated separately.
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PSLE Science Reality Lab Vol No.331 | “SPF 50” — Does That Mean 50 Times Longer in the Sun?
PSLE Science Reality Lab: learn why SPF is a standardized sunburn-protection ratio based on ultraviolet exposure, not a stopwatch that multiplies safe time in the sun.
