Q1 When the moon directly come between the sun and the earth , the eclipse formed is
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a solar eclipse
a lunar eclipse
any of these
none of these
Q3 Light is a form energy that causes the sensation of
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hearing
smell
sight
touch
Q4 A lunar eclipse occurs on
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a full moon day
a monday
a new moon day
any day
Q5 Object that do not allow light to pass through them are called
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transparent objects
translucent objects
opaque objects
luminous objects
Q2 The central dark region of a shadow is called the
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penumbra
umbra
total shadow
core
Q6 Any source of light that has a negligible extent is called
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point source of light
extended source of light
both
none
Q7 Condition for the formation of shadow is/are
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a source of light
an opaque object
an opaque screen
all of these
Q8 Some animals and microorganisms are capable of producing light from their body by chemical reaction is called
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chemical change
non bioluminescence
bioluminescence
none of these
Q9 A very fine or narrow path of light is called
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rays of light
beam of light
parallel beam of light
convergent beam of light
Q10 Light travels in straight lines as long as it is travelling in the same medium is called
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ray of light
beam of light
rectilinear propagation of light
all
Q11 Light rays received from a very distant source such as the sun are considered to be
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parallel beam of light
divergent beam of light
convergent beam of light
all
Q12 Application of rectilinear propagation of light is/are
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Formation of shadow
day and night occur
eclipse occur
all
Q13 A pinhole camera is a simple device used to take photographs of
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luminous object
non luminous object
stationary object
none of these
Q14 A solar eclipse can occur only on a
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full moon day
new moon day
both
none of these
Q15 The sun is completely blocked by the moon
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total solar eclipse
partial solar eclipse
both
none
Q16 the moon is a luminous body.
1 point
T
F
Q17 A opaque object does not allow any light to pass through it.
1 point
T
F
Q18 Most objects around us are luminous.
1 point
T
F
Q19 A shadow may or may not look like the actual shape of the object.
1 point
T
F
Q20 A shadow is formed when an opaque object blocks the path of light.
1 point
T
F
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