6 Questions
Explain the difference between luminous and non-luminous objects.
Luminous objects emit their own light, while non-luminous objects do not emit their own light.
Define rectilinear propagation of light.
Rectilinear propagation of light refers to the property of light to travel in a straight line.
What are some characteristics of light?
Light is a form of energy, it travels in a straight line, and it makes things visible.
What is a shadow?
A shadow is a dark area formed by an opaque object when it blocks the light from falling on another object or surface.
What is a mirror?
A mirror is a smooth and polished surface that reflects light regularly.
What is reflection of light?
The bouncing back of light ray from a shining surface is known as reflection of light.
Study Notes
Light and Shadows
- Luminous objects emit their own light, whereas non-luminous objects reflect light from other sources.
- Rectilinear propagation of light refers to the straight-line path that light travels, allowing it to be focused and directed.
Characteristics of Light
- Light is a form of electromagnetic radiation.
- Light has both wave-like and particle-like properties.
- Light travels at a speed of approximately 299,792,458 meters per second in a vacuum.
Shadows
- A shadow is the dark area that appears on the ground or on other surfaces when something or someone blocks the light from shining on those areas.
Mirrors and Reflection of Light
- A mirror is a reflective surface, typically made of glass with a metallic coating, that reflects light and images.
- Reflection of light occurs when light bounces back from a surface, such as a mirror, without being absorbed or transmitted.
Test your knowledge about luminous and non-luminous objects, the characteristics of light, and rectilinear propagation of light with this quiz.
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