5. The distance between the elbow to the tip of the middle finger is called __________.
6. The length of the shadow is longest in the ____________.
7. __________ object forms a dark shadow .
8. The reflection of an object in a mirror form a / an _________
Answers
Answer:
5. The cubit, generally taken as equal to 18 inches (457 mm), was based on the length of the arm from the elbow to the tip of the middle finger and was considered the equivalent of 6 palms or 2 spans.
6.Shadows are longest in the early morning and late afternoon/early evening when the sun appears low in the sky. As the Earth rotates on its axis, the sun hits each location in the morning at an angle. This becomes more vertical as the sun appears to pass more directly overhead around noon.
7. A dark shadow is formed when an object blocks the light source. To form a dark shadow object should be opaque or translucent. Tree is opaque object and it can block the light from passing through it.
8.A smooth plane surface that reflects the entire light incident on it is called a plane mirror. An image is the likeness of an object carried and formed by light in a mirror. This bouncing of light by any smooth surface is called reflection of light.
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