Match the column I with column II and column III and select correct option from the codes given below. (Note: These columns are for convex lens.) Column l (Position of the object) Column ll (Position of the image) Column lll (Type of image) a Object beyond 2 F i At 2 F p Real, inverted, large b Object at 2 F ii Same side as the object q Virtual, erect, magnified c Object between F and 2 F iii Beyond 2 F r Real, inverted, same size d Object within the focal length iv Between F and 2 F s Real, inverted, diminished

( a ) - ( iv ) - ( s ) ; ( b ) - ( i ) - ( r ) ; ( c ) - ( i i i ) - ( p ) ( d ) - ( ii ) - ( q )

( a ) - ( ii ) - ( p ) ; ( b ) - ( iii ) - ( q ) ; ( c ) - ( iv ) - ( r ) ; ( d ) - ( i ) - ( s )

a - iii - q ; b - ii - s ; c - ii - r ; d - 3 - p

( a ) - ( i ) - ( r ) ; ( b ) - ( iv ) - ( p ) ; ( c ) - ( i ) - ( s ) ; ( d ) - ( iv ) - ( q )

EASY

8th Foundation

IMPORTANT

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Important Questions on Light

EASY

8th Foundation

IMPORTANT

NSO Science Olympiad Workbook Grade 8>Chapter 15 - Light>EXERCISES>Q 10

An optician holds a test card $50 cm$ behind a patient. The patient then looks in the plane mirror which is $100 cm$ away. How far away from the patient's eyes is the image of the test card?

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EASY

8th Foundation

IMPORTANT

NSO Science Olympiad Workbook Grade 8>Chapter 15 - Light>EXERCISES>Q 11

The diagram shows a ray $P Q R$ travelling through a glass slab. Which option in the table gives the correct name for all three rays?

Question Image

	$P$	$Q$	$R$
$(A)$	Incident ray	Emergent ray	Refracted ray
$(B)$	Incident ray	Refracted ray	Emergent ray
$(C)$	Emergent ray	Incident ray	Refracted ray
$(D)$	Emergent ray	Refracted ray	Incident ray

EASY

8th Foundation

IMPORTANT

NSO Science Olympiad Workbook Grade 8>Chapter 15 - Light>EXERCISES>Q 12

A narrow beam of white light is passed through a glass prism as shown in the figure.

Question Image

Which of the following is the correct order of colours emerging from the prism?

	$P$	$Q$	$R$
$(A)$	Red	Blue	Green
$(B)$	Red	Green	Blue
$(C)$	Blue	Green	Red
$(D)$	Blue	Red	Green

EASY

8th Foundation

IMPORTANT

NSO Science Olympiad Workbook Grade 8>Chapter 15 - Light>EXERCISES>Q 13

A parallel beam of light is incident on a converging lens parallel to its principal axis. As one moves the source of light away from the lens on its principal axis, the intensity of light

MEDIUM

8th Foundation

IMPORTANT

NSO Science Olympiad Workbook Grade 8>Chapter 15 - Light>EXERCISES>Q 14

Three light bulbs are concealed from an observer by an opaque wall as shown. Without shifting the positions of the observer and the bulbs, the images of which of the bulbs can the observer see from the plane mirror?

Question Image

MEDIUM

8th Foundation

IMPORTANT

NSO Science Olympiad Workbook Grade 8>Chapter 15 - Light>EXERCISES>Q 16

Match the column I with column II and column III and select correct option from the codes given below. (Note: These columns are for convex lens.)

Column $l$ (Position of the object)		Column $ll$ (Position of the image)		Column $lll$ (Type of image)
$(a)$	Object beyond $2 F$	$(i)$	At $2 F$	$(p)$	Real, inverted, large
$(b)$	Object at $2 F$	$(ii)$	Same side as the object	$(q)$	Virtual, erect, magnified
$(c)$	Object between $F$ and $2 F$	$(iii)$	Beyond $2 F$	$(r)$	Real, inverted, same size
$(d)$	Object within the focal length	$(iv)$	Between $F$ and $2 F$	$(s)$	Real, inverted, diminished

EASY

8th Foundation

IMPORTANT

NSO Science Olympiad Workbook Grade 8>Chapter 15 - Light>EXERCISES>Q 17

Read the given statements and select the correct option.
Statement

1

: A beam of light emitted by the point source placed in water always diverges in air.
Statement

2

: The refracted ray moves away from normal when a ray goes from a denser medium to a rarer medium.

EASY

8th Foundation

IMPORTANT

NSO Science Olympiad Workbook Grade 8>Chapter 15 - Light>EXERCISES>Q 18

Consider the following statements and select the option which correctly identifies true (T) and false (F).
$(i)$ Part that gives colour to the eye is iris.
$(ii)$ Transparent outer layer that refracts light is lens.
$(iii)$ Retina is a light sensitive layer of the eye.
$(iv)$ Cornea is a region without any sensory cells.

	$(i)$	$(ii)$	$(iii)$	$(iv)$
$(A)$	$F$	$T$	$F$	$T$
$(B)$	$T$	$F$	$T$	$T$
$(C)$	$T$	$T$	$F$	$F$
$(D)$	$F$	$F$	$T$	$T$

For the myopic eye, the defect is cured by

Important Questions on Light

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