Chapter-Chapter 11. Light, Shadows and Reflections Science Curiosity class 7 in english Medium CBSE Notes
CBSE Class 7 Science Curiosity Notes in English Medium based on latest NCERT syllabus, covering definitions, diagrams, formulas, and exam-oriented explanations.
Chapter 11. Light, Shadows and Reflections
Quick Revising Notes
Chapter 11: Light, Shadows and Reflections
Definitions:
Light: Light is a form of energy that enables us to see objects.
Source of Light: A source of light is an object that emits light.
Transparent Objects: Objects that allow light to pass through completely.
Translucent Objects: Objects that allow light to pass partially.
Opaque Objects: Objects that do not allow light to pass through.
Shadow: A shadow is a dark region formed when an object blocks the path of light.
Reflection: Reflection is the bouncing back of light from a surface.
Plane Mirror: A plane mirror is a flat mirror that forms an upright image.
Image: An image is the picture formed by reflection of light.
Lateral Inversion: Lateral inversion is the reversal of left and right in an image formed by a mirror.
Pinhole Camera: A pinhole camera is a device that forms an image using a small hole instead of a lens.
Quick Revision Points:
- Light helps us see objects.
- Objects can be transparent, translucent, or opaque.
- Shadows are formed when light is blocked.
- Light travels in straight lines.
- Reflection occurs on smooth surfaces.
- Plane mirrors form upright and same-size images.
- Images in mirrors are laterally inverted.
- Pinhole camera forms inverted images.
- Light is important for daily life and vision.
- Reflection is used in many devices.
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