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What are Luminous and Non-Luminous Objects?, Light, Shadows and Reflections, Class 6 Science Video Lecture

FAQs on What are Luminous and Non-Luminous Objects?, Light, Shadows and Reflections, Class 6 Science Video Lecture

1. What is the difference between luminous and non-luminous objects?
Ans. Luminous objects are those that emit their own light, such as the Sun, a light bulb, or a candle flame. Non-luminous objects, on the other hand, do not emit their own light but can reflect light from other sources, like a book or a table.
2. How does light interact with luminous objects?
Ans. Light interacts with luminous objects by being emitted from them. These objects produce light energy through various processes, such as chemical reactions or the conversion of electrical energy into light. This emitted light then travels through space or other mediums to reach our eyes, allowing us to see these objects.
3. Can non-luminous objects produce shadows?
Ans. Yes, non-luminous objects can produce shadows. When light from a luminous source, like the Sun or a lamp, falls on a non-luminous object, it blocks some of the light and creates a shadow on the opposite side. The size and shape of the shadow depend on the position and size of the object, as well as the direction and intensity of the light source.
4. How are reflections formed?
Ans. Reflections are formed when light waves bounce off a surface and return to the same medium from which they originated. When light hits a smooth and shiny surface, like a mirror or water, it undergoes reflection. The angle at which the light hits the surface is called the angle of incidence, and the angle at which it bounces off is called the angle of reflection. The law of reflection states that the angle of incidence is equal to the angle of reflection.
5. Can non-luminous objects reflect light?
Ans. Yes, non-luminous objects can reflect light. When light falls on a non-luminous object, it can bounce off its surface and change direction. This reflection allows us to see the object, as the reflected light enters our eyes. The quality and amount of reflection depend on the surface characteristics of the object. For example, a smooth and shiny surface reflects more light compared to a rough and dull surface.
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