Q. 25.0( 3 Votes )

Who is telling lies?

(a) Light year is used to measure time

(b) End stage of a star depends on its initial mass

(c) A star ends its life as a neutron star when the pressure of its electrons balances its gravity

(d) Only light can emit from the black hole

(e) The Sun will pass through the supergiant stage during its evolution

(f) The Sun will end its life as a white dwarf

Answer :

(a)Lie

Explanation:


This is a lie because light year is used to measure distance.


1 light year = Distance travelled by light in one year


1 light year = km


(b) No Lie


Explanation:


Yes, the end stage of star depends on its initial mass.


Now, we are using mass of Sun = as a unit of measurement of mass of stars. So, the following table shows the end stage depends on the initial mass.


= Mass of Star



(c) Lie


Explanation:


A star ends up its life as a neutron star when the pressure of its neutrons (and not the electron) balances its gravity. The pressure of these neutrons is independent of temperature and balances the gravitational force forever.


(d) Lie


Explanation:


This is a lie since the black hole does not emit and it absorbs any light. Any light falling on black hole does not get reflected and gets absorbed inside the star.


(e) Lie


Explanation:


Sun does not pass through the supergiant stage during its evolution. Sun passes through the red giant stage, then explode and then the end stage is a white dwarf. The evolution depends on mass. Only stars having masses greater than the 8 times the mass of Sun undergo a supergiant stage ().


(f) Not Lie


Explanation:


The Sun will end its life as a white dwarf since according to the mass, it will undergo the evolution whose end product is a white dwarf ( is evidently less than 8 ). The White Dwarf is of the size of the earth but has large mass, and thus is highly dense.


Rate this question :

How useful is this solution?
We strive to provide quality solutions. Please rate us to serve you better.
Related Videos
Quiz | Stars and Solar SystemQuiz | Stars and Solar SystemQuiz | Stars and Solar System26 mins
Lakhmir Singh | Stars and the Solar System (Part-1)Lakhmir Singh | Stars and the Solar System (Part-1)Lakhmir Singh | Stars and the Solar System (Part-1)37 mins
Let's Discuss NCERT QuestionLet's Discuss NCERT QuestionLet's Discuss NCERT Question41 mins
Smart Revision | The Solar SystemSmart Revision | The Solar SystemSmart Revision | The Solar System41 mins
Mathematics in Daily LifeMathematics in Daily LifeMathematics in Daily Life34 mins
Conserve Life Around UsConserve Life Around UsConserve Life Around Us42 mins
Mathematics in Real LifeMathematics in Real LifeMathematics in Real Life34 mins
Smart Revision | The Moon and the Moon's SurfaceSmart Revision | The Moon and the Moon's SurfaceSmart Revision | The Moon and the Moon's Surface46 mins
Smart Revision | ConstellationSmart Revision | ConstellationSmart Revision | Constellation42 mins
Champ Quiz | Secret of the Cell ShapeChamp Quiz | Secret of the Cell ShapeChamp Quiz | Secret of the Cell Shape34 mins
Try our Mini CourseMaster Important Topics in 7 DaysLearn from IITians, NITians, Doctors & Academic Experts
Dedicated counsellor for each student
24X7 Doubt Resolution
Daily Report Card
Detailed Performance Evaluation
caricature
view all courses