alleryIn a glass slab, a ray of light is refracted twice. The emergent ray is:
APerpendicular to the incident ray
BParallel to the incident ray but laterally displaced
CAlong the same line as the incident ray (option)
DReflected back to the source
Answer & Solution
Correct answer: B. Parallel to the incident ray but laterally displaced
1. At the first surface the ray bends towards the normal.
2. At the second parallel surface it bends away from the normal by the same angle.
3. The emergent ray is therefore parallel to the incident ray with a lateral shift.
_Source: syllabus Science, Ch 9 "Light Reflection and Refraction", §9.3.1_
Keep practising Refraction of Light and Lenses
Browse all Refraction of Light and Lenses questions for Andhra Pradesh SSC (Class 10), or explore more Science topics.
Related questions
A child cannot read words on the blackboard clearly. The likely defect and correction are:The image formed on the retina by the human eye is:Scattering of light is most pronounced when the wavelength of light is:A 10-cm-tall object placed 30 cm in front of a 20-cm concave mirror has an image at:Cataract refers to:A myopic person's far point is 50 cm. The corrective lens has power:Tyndall effect refers to:The phenomenon of dispersion was first scientifically demonstrated by: