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Byju's Answer
Standard VII
Physics
Astronomical Unit
One light yea...
Question
One light year is equal to ______.
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Solution
One light-year: It is the distance traveled by the light in one year.
As we know in one second light travels 300000 km
T
h
u
s
1
l
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g
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t
y
e
a
r
=
1
y
e
a
r
×
s
p
e
e
d
o
f
l
i
g
h
t
i
n
o
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e
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c
⇒
1
l
i
g
h
t
y
e
a
r
=
(
365
×
24
×
60
×
60
s
e
c
)
×
(
300000
k
m
s
-
1
)
1
l
i
g
h
t
y
e
a
r
=
9
.
46
×
10
12
k
m
Hence, One light-year is equal to
9
.
46
×
10
12
k
m
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Similar questions
Q.
One light year, a unit of length, is equal to how many kilometers? (approximate)
Q.
one light-year is equal to how many years?
one light-year is equal to how many kilometres?
one light-year is equal to how many metres?
ans why it's known to be 'light year'?
Answer all with explaination.
Q.
Assertion :A light-year is a distance that light travels with velocity of
3
×
10
8
m
s
−
1
in one year. Reason: Light year is the unit for measuring time.
Q.
One parsec is equal to ______ light years.
Q.
Assertion (A)
: Light year is the unit of time.
Reason (R): Light year is the distance travelled by light in vacuum in one year.
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