LIGHT AND SHADOW
1) DEFINE LIGHT ?
2) WRITE SOURCES OF LIGHT WITH EXAMPLES?
3) WRITE TRANSPARENT , TRANSLUSCENT AND OPAQUE OBJECTS WITH EXAMPLES?
4) DEFINE SHADOW ?
5) DEFINE SOLAR ECLIPSE AND LUNAR ECLIPSE?
6) DEFINE LUMINIOUS AND NON - LUMINIOUS OBJECTS?
7) DEFINE SIZE OF THE SHADOW?
8) WHAT CAUSES DAY AND NIGHT?
9) WHAT CAUSES SEASONS?
10)3 THINGS ARE REQUIRED FOR FORMATION OF SHADOW?
Answers
Answer:
2) ans. sun,light,moon
Explanation:
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Answer:
1) Light is a form of electromagnetic radiation that enables the human eye to see or make things visible. It is also defined as radiation that is visible to the human eye. Light contains photons, which are minute packets of energy.
2) A light source is anything that makes light. There are natural and artificial light sources. A few examples of natural light sources include the Sun, stars and candles. A few examples of artificial light sources include light bulbs, lamp posts and televisions.
3) Transparent: Clean glass, water, air.
Translucent: Frosted glass, wax paper, butter paper, smoke.
Opaque: Stone, metal, wood
4) a dark area or shape produced by a body coming between rays of light and a surface.
5) Solar eclipses result from the Moon blocking the Sun relative to the Earth; thus Earth, Moon and Sun all lie on a line. Lunar eclipses work the same way in a different order: Moon, Earth and Sun all on a line. In this case the Earth's shadow hides the Moon from view.
6) Objects like the sun that give out or emit light of their own are luminous objects. Other examples of luminous bodies are Electric bulb, torch etc. Non-luminous objects:- the objects that can not emit light energy by themselves are known as Non- luminous objects.
7) A point of light casts a sharp-edged shadow. The shadow can be traced on paper. The size of the shadow depends on the size of the object, the distance from the light to the object and the distance from the light to the screen. A bright point of light.
8) The Earth orbits the sun once every 365 days and rotates about its axis once every 24 hours. Day and night are due to the Earth rotating on its axis, not its orbiting around the sun. The term 'one day' is determined by the time the Earth takes to rotate once on its axis and includes both day time and night time.
9) Seasons occur because Earth is tilted on its axis relative to the orbital plane, the invisible, flat disc where most objects in the solar system orbit the sun. Earth's axis is an invisible line that runs through its center, from pole to pole.
10) The following three things are required for a shadow to form: a source of light. an opaque object. a screen or surface behind the object.
Explanation:
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