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NCERT Solutions for Class 6 Science - Light Shadow & Reflections

Q1. Rearrange the boxes given below to make a sentence that helps us understand opaque objects
NCERT Solutions for Class 6 Science - Light Shadow & Reflections
Ans: The given boxes can be rearranged to form ‘Opaque Objects Make Shadows’ as shown below
NCERT Solutions for Class 6 Science - Light Shadow & Reflections


Q2. Classify the objects or materials given below as opaque, transparent or translucent and luminous or non-luminous:
Air, water, a piece of rock, a sheet of aluminium, a mirror, a wooden board, a sheet of polythene, a CD, smoke, a sheet of plane glass, fog, a piece of red hot iron, an umbrella, a lighted fluorescent tube, a wall, a sheet of carbon paper, the flame of a gas burner, a sheet of cardboard, a lighted torch, a sheet of cellophane, a wire mesh, kerosene stove, sun, firefly, moon.
Ans: Opaque: A piece of rock, a sheet of aluminium, a mirror, a wooden board, a CD, a piece of red hot iron, an umbrella, a lighted fluorescent tube, a wall, a sheet of carbon paper, the flame of a gas burner, a sheet of cardboard, a lighted torch, kerosene stove, sun, firefly, moon.
Transparent: Air, water, a sheet of plane glass.
Translucent: A sheet of polythene, smoke, fog, a sheet of cellophane, a wire mesh.

NCERT Solutions for Class 6 Science - Light Shadow & Reflections

Luminous: A piece of red hot iron, a lighted fluorescent tube, the flame of a gas burner, a lighted torch, sun, firefly.
Non – luminous: Air, water, a piece of rock, a sheet of aluminium, a mirror, a wooden board, a sheet of polythene, a CD, smoke, a sheet of plane glass, fog, an umbrella, a wall, a sheet of carbon paper, a sheet of cardboard, a sheet of cellophane, a wire mesh, kerosene stove, moon.


Q3. Can you think of creating a shape that would give a circular shadow if held in one way and a rectangular shadow if held in another way?
Ans: A cylinder object can cast shadows in two ways. When the top circular view faces the shining object, a circular shape shadow is formed. When its curved side faces the shining object, it casts a rectangular shadow.


Q4. In a completely dark room, if you hold up a mirror in front of you, will you see a reflection of yourself in the mirror?
Ans: No, in a dark room, a mirror reflection of the image will not be shown as the light will not fall on the mirror to reflect the image due to darkness.

The document NCERT Solutions for Class 6 Science - Light Shadow & Reflections is a part of the Class 6 Course Science Class 6.
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FAQs on NCERT Solutions for Class 6 Science - Light Shadow & Reflections

1. What is light and how does it travel?
Ans. Light is a form of energy that enables us to see objects. It travels in the form of electromagnetic waves. These waves consist of electric and magnetic fields that oscillate perpendicular to each other and to the direction of light propagation.
2. What are the different types of shadows?
Ans. There are three types of shadows: umbra, penumbra, and antumbra. The umbra is the darkest central part of a shadow where all light is blocked. The penumbra is a lighter region where only a part of the light source is blocked. The antumbra is the area beyond the penumbra where the light source appears larger than the blocking object.
3. How is a shadow formed?
Ans. A shadow is formed when an object blocks light from a source. The light rays that are blocked by the object cannot reach the surface behind it, creating a dark region. The shape and size of the shadow depend on the position and size of the object, as well as the direction and intensity of the light source.
4. What causes a reflection of light?
Ans. Reflection occurs when light rays bounce off a surface. It happens because light travels in straight lines and obeys the law of reflection, which states that the angle of incidence (the angle between the incident ray and the normal to the surface) is equal to the angle of reflection (the angle between the reflected ray and the normal).
5. How do mirrors work in reflecting light?
Ans. Mirrors work by reflecting light due to the smoothness and reflective coating on their surface. When light rays hit the mirror, they bounce off, following the law of reflection. This reflected light forms an image, which we see when we look at the mirror. The type of reflection that occurs in mirrors is called regular or specular reflection, resulting in a clear and sharp image.
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