Light
14 solved questions from Class 8 Science, each with the full working. Tap any question to see the step-by-step solution.
- 1 What is the fundamental scientific concept introduced in the chapter 'Light'? medium MCQ Key Concept & Definition
- 2 Which of the following is an important application or observation related to 'Light'? easy MCQ Practical Application
- 3 What primary question does the chapter 'Light' aim to answer? medium MCQ Core Scientific Inquiry
- 4 Why is the study of 'Light' essential for students in class-8? hard MCQ Importance & Significance
- 5 Which key practice is recommended while studying topics in 'Light'? medium MCQ Scientific Method
- 6 What is the primary topic or theoretical principle explored in 'Light' (Class 8 SCIENCE)? medium MCQ Chapter Core Principle
- 7 Which key mechanism or analytical rule is highlighted in 'Light'? medium MCQ Key Analytical Mechanism
- 8 A right‑angle prism has an apex angle of 45°. When green light of wavelength 520 nm is incident, the minimum angle of deviation is 35°. Find the refractive index of the prism for green light. hard 3 marks Refractive index from minimum deviation
- 9 Explain the main physical processes that cause a rainbow to appear when sunlight passes through rain droplets. medium 2 marks Dispersion and rainbow formation
- 10 A laser beam of wavelength 650 nm passes through a flat glass slab of thickness 3 cm and refractive index 1.5. The lateral displacement of the emergent beam is measured to be 0.25 cm. Calculate the angle of incidence (to the normal) of the laser beam on the slab. hard 2 marks Lateral shift in a glass slab
- 11 When a beam of light passes from air into a glass block, how does its direction change? easy MCQ 1 mark Refraction of light
- 12 A beam of light strikes a perfectly smooth plane mirror at an angle of 20° to the normal. What is the angle between the incident ray and the reflected ray? easy MCQ 1 mark Law of reflection
- 13 Light travels from water (refractive index n_1=1.33) to air (n_2=1.0). The ray makes an angle of 50° with the normal while in water. Determine whether the light will refract into the air or undergo total internal reflection. hard 3 marks Total internal reflection
- 14 Explain why light bends when it enters a different medium. easy 1 mark Refraction principle