Odia Medium Class 8 Science Chapter 13 Question Answer

BSE Odisha Class 8 Science Chapter 13: Light (ଆଲୋକ)

Mastering the concepts of Light is essential for understanding how we see the world. At Odisha Board Solutions, we provide simplified, stepwise answers for Class 8 Science Chapter 13, updated for the 2026-27 academic session.

1. Reflection of Light (ଆଲୋକର ପ୍ରତିଫଳନ)

When light falls on a polished surface, like a mirror, it bounces back. This is called reflection.

Laws of Reflection:

  1. The Angle of Incidence ($i$) is always equal to the Angle of Reflection ($r$).

  2. The incident ray, the reflected ray, and the normal at the point of incidence all lie in the same plane.

2. Regular and Diffused Reflection

  • Regular Reflection: Occurs when light reflects off a smooth surface (like a mirror), forming a clear image.

  • Diffused (Irregular) Reflection: Occurs when light reflects off a rough surface (like a wall or cardboard), and the rays are scattered in different directions.

3. Multiple Images and the Kaleidoscope

When two mirrors are placed at an angle to each other, they form multiple images. This principle is used in a Kaleidoscope, which creates beautiful, ever-changing patterns.

4. The Human Eye (ମଣିଷ ଚକ୍ଷୁ)

The eye is one of our most important sense organs. In the BSE Odisha exams, the structure of the eye is a vital topic.

Key Parts of the Eye:

  • Cornea: The transparent front part that protects the eye.

  • Iris: The colored part that controls the size of the pupil.

  • Lens: Focuses light onto the back of the eye.

  • Retina: The screen where images are formed. It contains nerve cells (Cones for color and Rods for dim light).

  • Blind Spot: The junction of the optic nerve and the retina where no vision is possible.

5. Care of the Eyes and Braille System

  • Eye Care: Avoid reading in very dim or very bright light. Never look at the sun directly.

  • Braille System: A specialized tactile system used by visually challenged persons to read and write.

6. Download Class 8 Science Chapter 13 PDF (Odia Medium)

We offer a FREE PDF Download of the Class 8 Science Chapter 13 Questions and Answers. This PDF is optimized for Odia medium students.

Revision Tip: Practice drawing the Reflection of Light and the Human Eye diagrams, as these are mandatory long-answer questions in the BSE Odisha Summative Assessments.