Science · Class 6
Light, Shadows and Reflections
Luminous objects, shadows, pinhole camera, and reflection from plane mirror.
4 sections15–25 min read6 MCQs · 2 examples
Chapter Overview
Light travels in a straight line (rectilinear propagation). Opaque objects block light to form shadows. Reflection from shiny surfaces follows laws that help understand mirrors and images.
Light and Shadows
- Luminous objects emit light (Sun, bulb)
- Transparent: light passes (glass); opaque: blocks (wood); translucent: partial
- Shadow forms when opaque object blocks light
- Umbra (dark) and penumbra (partial shadow)
Pinhole Camera
- Light through tiny hole forms inverted image
- Image is real and upside down
Reflection
- Light bounces back from smooth shiny surfaces
- Image in plane mirror is erect, virtual, same size
- Lateral inversion: left appears right in mirror
Solved Examples
Step-by-step solutions — read each step before checking the final answer.
Shadow size
When is shadow longest — morning or noon?
- 1Sun low in morning → long shadow
- 2Sun overhead at noon → shortest shadow
- 3Shadow length changes with Sun position
Answer
Longest in early morning and late evening
Mirror image
You raise your right hand in front of a mirror. Which hand appears raised?
- 1Plane mirror shows lateral inversion
- 2Left appears as right in image
- 3Your right hand looks like left in mirror
Answer
Left hand appears raised in mirror
Key Points to Remember
- ✓ Light cannot bend around opaque objects sharply
- ✓ Shadow needs source, object, and screen
- ✓ Moon is non-luminous — reflects Sun's light
Exam Tips
- • Draw ray diagram for shadow formation
- • Distinguish transparent, translucent, opaque
- • Explain pinhole camera image inversion
Practice MCQs — Light, Shadows and Reflections
Test your understanding with topic-wise multiple choice questions. Explanations appear after each answer.
Question 1 of 6Score: 0/0
Light travels in: