Read Object distance
This SOF ISO pattern tests shadow size near screen and light. Read the condition carefully, then use the method below before you solve.
Motion and force questions become simpler when direction, starting condition, time and the acting forces are marked first.
Trace the light ray before choosing an image
Trace the ray in the direction light travels
A ray travels from source to object and then to the eye. At a mirror, the angle of incidence equals the angle of reflection.
Find the tested idea
Write down the quantities, directions or conditions given in the stem before selecting a formula or rule.
Work from the evidence
Use one governing relationship at a time. For a visual question, trace the path; for a numerical question, keep units and signs consistent.
Verify before choosing
Use the wording, diagram and units exactly as given. Select an option only after it satisfies every stated condition.
OlympIQ exam lens
- ✓Extract the condition.
- ✓Apply one governing rule.
- ✓Check sign, unit or direction.
Check the result against a simple limiting case, diagram direction or unit before choosing an option.
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