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According to most scientists, the universe began approximat : Reading Comprehension

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Re: According to most scientists, the universe began approximat [#permalink]
Could someone please provide an explanation for the third question?

It can be inferred from the passage that a standard candle may not provide an accurate measure of distance if

A) the galaxy being measured is moving too quickly
B) interstellar dust makes the object measured appear dimmer than it really is
C) if the galaxy being measured has a local component of measurement
D) the particles being measured do not completely accord with a linear motion
E) the galaxies being measured move at different speeds
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Re: According to most scientists, the universe began approximat [#permalink]
3
Explanation For Question 3)

It can be inferred from the passage that a standard candle may not provide an accurate measure of distance if

A) the galaxy being measured is moving too quickly
B) interstellar dust makes the object measured appear dimmer than it really is
C) if the galaxy being measured has a local component of measurement
D) the particles being measured do not completely accord with a linear motion
E) the galaxies being measured move at different speeds

Last line says "...assuming, of course, that distance is the only factor affecting brightness."
In other words, if ANYTHING other than distance is affecting the brightness then you wouldn't get an accurate measurement.
The only answer choice which suggests brightness is the second one.
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Re: According to most scientists, the universe began approximat [#permalink]
shuklamitanshu wrote:
Explanation For Question 3)

It can be inferred from the passage that a standard candle may not provide an accurate measure of distance if

A) the galaxy being measured is moving too quickly
B) interstellar dust makes the object measured appear dimmer than it really is
C) if the galaxy being measured has a local component of measurement
D) the particles being measured do not completely accord with a linear motion
E) the galaxies being measured move at different speeds

Last line says "...assuming, of course, that distance is the only factor affecting brightness."
In other words, if ANYTHING other than distance is affecting the brightness then you wouldn't get an accurate measurement.
The only answer choice which suggests brightness is the second one.








It is Clearly mentioned that
" if the galaxies are moving at incredible speeds, is difficult to observe." so it should be option A no right? please explain
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According to most scientists, the universe began approximat [#permalink]
1
Hi,

It can be inferred from the passage that a standard candle may not provide an accurate measure of distance if ...

Consider this from the passage : Scientists must, therefore, rely on a “standard candle,” an object of known brightness within the galaxy they wish to observe. Using the inverse square law, scientists can then measure how far that galaxy is away from our own. For instance, suppose a supernova in galaxy A appears one hundred times as bright as one in galaxy B. By the inverse square law, galaxy B is ten times farther away than galaxy A, assuming, of course, that distance is the only factor affecting brightness.

We need to find answer relative to measuring the distance. So if light is coming without any blockage, distance from earth can be measured.


wewake06298 wrote:
shuklamitanshu wrote:
Explanation For Question 3)

It can be inferred from the passage that a standard candle may not provide an accurate measure of distance if

A) the galaxy being measured is moving too quickly
B) interstellar dust makes the object measured appear dimmer than it really is
C) if the galaxy being measured has a local component of measurement
D) the particles being measured do not completely accord with a linear motion
E) the galaxies being measured move at different speeds

Last line says "...assuming, of course, that distance is the only factor affecting brightness."
In other words, if ANYTHING other than distance is affecting the brightness then you wouldn't get an accurate measurement.
The only answer choice which suggests brightness is the second one.








It is Clearly mentioned that
" if the galaxies are moving at incredible speeds, is difficult to observe." so it should be option A no right? please explain
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Re: According to most scientists, the universe began approximat [#permalink]
que 2 why option a is wrong
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Re: According to most scientists, the universe began approximat [#permalink]
1
Hey,

Choice A is exactly the opposite of inverse square law discussed in the last para. Nearer one should be more brighter.

void wrote:
que 2 why option a is wrong
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Re: According to most scientists, the universe began approximat [#permalink]
shravyashetty wrote:
Could someone please provide an explanation for the third question?

It can be inferred from the passage that a standard candle may not provide an accurate measure of distance if

A) the galaxy being measured is moving too quickly
B) interstellar dust makes the object measured appear dimmer than it really is
C) if the galaxy being measured has a local component of measurement
D) the particles being measured do not completely accord with a linear motion
E) the galaxies being measured move at different speeds


By the inverse square law in the last paragraph, we know that the distance is the ONLY factor that affects brightness, with which we can directly calculate the distance. But intervened by stardust, the relation is uncertain because we don't know how to fix this.
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Re: According to most scientists, the universe began approximat [#permalink]
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