FREE — full mock, no signup
20 questions · No time limit
20 marks · +1 per question
How to use this review Attempt this free, original learning review after the three optics lessons: Reflection and Mirrors; Refraction and Lenses; Human Eye, Dispersion and Optical Effects. There are 20 questions, each worth one mark, with exactly one correct option. The review is untimed, with no negative marking and no pass cutoff. A suggested 25 minutes is only a study aid, not an official examination duration. This is not a full RRB CBT simulation and does not reproduce official CBT scoring. Use real upright objects unless a question says otherwise. Mirror and lens calculations use the paraxial model (rays close to the principal axis); lenses are thin and in air. Incident light travels from left to right. Under the Cartesian convention, distances to the right are positive and distances to the left negative, measured from the mirror pole or the lens optical centre. Thus u is less than 0 for the real objects used here. The sign of v must be interpreted for the particular mirror or lens, not guessed from the word “real”. Angles of incidence, reflection and refraction are measured from the normal. Before viewing an explanation, record your choice and one reason or calculation. Then identify any error: normal versus surface, object position, sign convention, wrong mirror/lens formula, unit conversion, image nature, or confusion between refraction, dispersion and scattering. Revisit the relevant lesson and retry the missed question without looking at the answer.
An account is needed only at the end to save your result.
