Question
What is the difference between image and shadow?
✓
Answer
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S.No.
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Image
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Shadow
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$1.$
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Image is formed due to reflection or refraction of light
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Shadow is formed when light falls on the opaque body.
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$2.$
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Image is seen when light coming from the object after reflection or refraction enters the observes’s eye.
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No light enters the eye from the shadow of the object.
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$3.$
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Image gives more information such as colour, structure, etc., about the object
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Shadow does not provide any detail about the object, it gives an idea about the shape of the object.
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Vaishnavi has not gone to school as she is ill. Her mother has kept a record of her body temperature for three days as shown in Table below
Table: Body temperature record of Vaishnavi
$(i)$ What was Vaishnavi’s highest recorded temperature?
$(ii)$ On which day and at what time was Vaishnavi’s highest temperature recorded?
$(iii)$ On which day did Vaishnavi’s temperature return to normal?
→Table: Body temperature record of Vaishnavi
| Temperature at | ||||||
| DAY | $7\ am$ | $10\ am$ | $1\ pm$ | $4\ pm$ | $7\ pm$ | $10\ pm$ |
| One | $38.0 ^\circ C$ | $37.8 ^\circ C$ | $38.0^\circ C$ | $38.0^\circ C$ | $40.0 ^\circ C$ | $39.0 ^\circ C$ |
| Two | $38.6 ^\circ C$ | $38.8 ^\circ C$ | $39.0^\circ C$ | $39.0^\circ C$ | $39.0 ^\circ C$ | $38.0 ^\circ C$ |
| Three | $37.6 ^\circ C$ | $37.4^\circ C$ | $37.2 ^\circ C$ | $37.0 ^\circ C$ | $36.8 ^\circ C$ | $36.6 ^\circ C$ |
$(i)$ What was Vaishnavi’s highest recorded temperature?
$(ii)$ On which day and at what time was Vaishnavi’s highest temperature recorded?
$(iii)$ On which day did Vaishnavi’s temperature return to normal?
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S.No.
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COLUMN $I$
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S.No.
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COLUMN $II$
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$A.$
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A moving wheel of a $(i)$ Sewing machine.
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$i.$
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Circular motion.
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$B.$
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Movement of tip of the minute hand of a clock in one hour.
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$ii.$
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Rotational motion.
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$C.$
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A moving swing.
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$iii.$
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Periodic motion.
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