Skip to main content
Super TutorResources
Chapter 5 of 8
Study Plan

Light Energy — Study Plan

ICSE · Class 8 · Physics

A step-by-step study plan for Light Energy, ICSE Class 8 Physics: what to learn first, what to practise and when to revise.

44 questions36 flashcards10 formulas & key relations5 concepts

Interactive on Super Tutor

Studying Light Energy? Get the full interactive chapter.

Quizzes, flashcards, AI doubt-solver and a step-by-step study plan — built for study plan and more.

Try Super Tutor — Free

Free trial, no card needed.

A diagram illustrating the concept of apparent depth, showing an object placed at the bottom of a liquid and how it appears to be at a shallower depth when viewed from above due to refraction.
Super Tutor

One of 5 illustrations for Light Energy in Super Tutor — alongside flashcards, concept maps and practice questions.

Study Plan

1
Day 1–2

Learn the Theory

Read the textbook chapter carefully. Note down definitions, formulas and key ideas. Focus on: Refraction of Light, Effects of Refraction, Prism and Dispersion.

2
Day 3

Practise

Solve the textbook exercises and extra practice questions. There are 44 questions available for this chapter.

3
Day 4

Revise & Test

Revise key points without looking at your notes. Take a practice quiz and mark weak areas for another pass.

4
Day 7

Spaced Revision

Come back to Light Energy after a week. Use flashcards for quick recall and try past exam questions on this chapter.

What to Focus On

  • Speed of light in air = 3×10^8 m/s
  • Speed of light in water = 2.25×10^8 m/s
  • Speed of light in glass = 2×10^8 m/s
  • Refraction is bending of light at the boundary of two transparent media
  • Rarer to denser: bends towards the normal
  • Denser to rarer: bends away from the normal
  • Refractive index compares speeds of light in two media
  • Refractive index of water with respect to air = 4/3 = 1.33
  • Refractive index of glass with respect to air = 1.5

Common Mistakes to Avoid

Light always bends in the same direction when it enters another medium.

Air has refractive index 0, so it does not affect light.

The speed of light is higher in glass than in air because glass is more solid.

Memory Tips

Refraction of light

Rarer to denser bends towards the normal

Denser to rarer bends away from the normal

Ray falling normally passes undeviated

Want a personalised study plan?

Super Tutor builds a day-by-day plan for ICSE Class 8 Physics that fits your exam date and pace.

Create My Study Plan

Frequently Asked Questions

What are the important topics in Light Energy for ICSE Class 8 Physics?
Key topics in Light Energy include Refraction of Light, Effects of Refraction, Prism and Dispersion, Spherical Mirrors. Study these first, then practise questions on each for Class 8 exams.
How should I revise Light Energy for Class 8 exams?
Learn the core ideas first, then work through the 44 practice questions on Light Energy. Revise definitions regularly and use flashcards for quick recall before the exam.

Sources & Official References

Content is aligned to the official syllabus. Refer to the board website for the latest curriculum.

More resources for Light Energy

All ICSE Class 8 Physics Study Plan

For serious students

Get the full Light Energy chapter — start free.

Quizzes, flashcards, an AI doubt solver and a study plan for ICSE Class 8 Physics. Free to start, no card needed.

Try Super Tutor Free
Try this chapter free