Physics Practice Test – Refraction of Light at Plane and Curved Surfaces (Questions with Answers and Explanations)

An ant is found under a regular glass slab of thickness 10.0cm and refractive index 1.7. Calculate the apparent displacement of the ant if viewed vertically from above the slab. (JAMB 2019)

A. 4.1 cm     B. 3.8 cm    C. 5.9 cm    D. 6.9 cm

A converging lens has a focal length of 20 cm. The lens forms a real inverted image of the same size as the object when the object distance from the lens is? (JAMB 2021)

A. 40cm    B. 30cm    C. 20 cm    D. 10 cm

The optical phenomenon responsible for rainbow is ________ (JAMB 2018)

A. refraction   B. diffusion   C. reflection   D. dispersion

An erect image four times as big as the object is fanned by a lens of focal length 15.0 cm. What is the image distance from the lens? (JAMB 2020)

A. 45 cm    B. 30 cm    C. 11.3 cm    D. 18.8 cm

When a man stands in water, his legs appear shorter, which principle causes this? (JAMB 2022)

A. Reflection    B. Polarisation    C. Refraction    D. Diffraction