Class 6 Exam > Class 6 Videos > What are Luminous and Non-Luminous Objects?, Light, Shadows and Reflections, Class 6 Science
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? |  |
| 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.
Text Transcript from Video
the main source of light energy for our
planet earth is Sun this is called solar
energy we get light from the Sun during
daytime only at night as light from Sun
is not available so we have to use other
sources of light we convert electrical
energy into light energy in bugs and
tube light and this helps us to see at
night in olden days when there was no
electricity people used to burn oil wax
or wood to get life any object that
produces light is known as a luminous
object the Sun and other electrical
appliances that give us light are
luminous objects most of the objects do
not produce light they are therefore
called non luminous objects for example
chair table al mera etc do you know that
some animals can also produce light you
must have seen a firefly or jug new that
produces light at night some fish like
lantern fish that live deep in the
oceans can also produce light the light
produced by animals is called living
light or bio human sense
planet earth is Sun this is called solar
energy we get light from the Sun during
daytime only at night as light from Sun
is not available so we have to use other
sources of light we convert electrical
energy into light energy in bugs and
tube light and this helps us to see at
night in olden days when there was no
electricity people used to burn oil wax
or wood to get life any object that
produces light is known as a luminous
object the Sun and other electrical
appliances that give us light are
luminous objects most of the objects do
not produce light they are therefore
called non luminous objects for example
chair table al mera etc do you know that
some animals can also produce light you
must have seen a firefly or jug new that
produces light at night some fish like
lantern fish that live deep in the
oceans can also produce light the light
produced by animals is called living
light or bio human sense
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