Light – Reflection and Refraction

Topics in this chapter

• Laws of Reflection
• Spherical Mirrors and Ray Diagrams
• Mirror Formula and Magnification
• Refraction and Refractive Index
• Refraction Through Glass Slabs
• Spherical Lenses and Ray Diagrams
• Lens Formula, Magnification and Power

Cheat sheet

Practice questions

1. Question 1Q-0CD28A

   What is the shape of a convex lens?

   1. A.Thinner at the centre than at the edges
   2. B.Uniform thickness throughout
   3. C.Thicker at the centre than at the edges
   4. D.Diverges parallel rays passing through it
   See the answer and solution
2. Question 2Q-2C751F

   Which mirror always forms a virtual, erect, and diminished image?

   1. A.Convex mirror
   2. B.Concave mirror
   3. C.Biconcave mirror
   4. D.Plane mirror
   See the answer and solution
3. Question 3Q-55A049

   Which mirror do ENT doctors use to focus light during examinations?

   1. A.Concave mirror
   2. B.Plane mirror
   3. C.Convex mirror
   4. D.Cylindrical mirror
   See the answer and solution
4. Question 4Q-774F46

   How does the frequency of light change when it enters glass from air?

   1. A.Increases
   2. B.Depends on the angle of incidence
   3. C.Stays exactly the same
   4. D.Decreases
   See the answer and solution
5. Question 5Q-A03AF3

   Where is the image formed when an object is at a concave mirror's focus?

   1. A.At the centre of curvature
   2. B.Beyond the centre of curvature
   3. C.Between the focus and the centre of curvature
   4. D.At infinity
   See the answer and solution