Physics

Two stars $$S_1$$ and $$S_2$$ are located at distances $$d_1$$ and $$d_2$$ respectively. Also if $$d_1>d_2$$ then which of the following statements is true?


ANSWER

The parallax of $$S_2$$ is greater than parallax of $$S_1$$


SOLUTION
$$Answer:-$$ D

Parallax is a displacement or difference in the apparent position of an object viewed along two different lines of sight, and is measured by the angle or semi-angle of inclination between those two lines.Due to foreshortning, nearby objects have a larger parallax than more distant objects when observed from different positions, so parallax can be used to determine distances.

Hence parallax of $$S_2$$ is greater than that of $$S_1$$

Astronomersuse the principle of parallax to measure distances to the closer stars. Here, the term "parallax" is the semi-angle of inclination between two sight-lines to the star, as observed when the Earth is on opposite sides of the Sun in its orbit.

View Answers

You're just one step away

Create your Digital Resume For FREE on your name's sub domain "yourname.wcard.io". Register Here!


Single Correct Medium Published on 18th 08, 2020
Next Question
Questions 244531
Subjects 8
Chapters 125
Enrolled Students 218
Enroll Now For FREE

Realted Questions

Q1 Single Correct Medium
The equation of state of a gas is given by $$\left( p+\cfrac { a }{ { V }^{ 3 } }  \right) \left( V-{ b }^{ 2 } \right) =cT$$, where $$p,V,T$$ are pressure, volume and temperature respectively and $$a,b,c$$ are constants. The dimensions of $$a$$ and $$b$$ are respectively:
  • A. $$\left[ M{ L }^{ 8 }{ T }^{ -2 }\quad and\quad { L }^{ 3/2 } \right] $$
  • B. $$\left[ M{ L }^{ 5 }{ T }^{ -2 }\quad and\quad { L }^{ 3 } \right] $$
  • C. $$\left[ M{ L }^{ 8 }{ T }^{ -2 }\quad and\quad { L }^{ 6 } \right] $$
  • D. $$\left[ M{ L }^{ 6 }{ T }^{ -2 }\quad and\quad { L }^{ 3/2 } \right] $$

Asked in: Physics - Units and Measurement


1 Verified Answer | Published on 18th 08, 2020

View Answer
Q2 Single Correct Medium
Which of the following statements is true ?
  • A. Velocity, Acceleration, Displacement and Force are scalars
  • B. Weight, Mass, Torque, Energy and Work are scalars
  • C. Angular Velocity, Momentum, Electric field are vectors
  • D. A vector quantity is a quantity in which only magnitude is specified while in case of scalar quantity both magnitude and direction are specified

Asked in: Physics - Units and Measurement


1 Verified Answer | Published on 18th 08, 2020

View Answer
Q3 Single Correct Hard
Consider a vessel filled with carbodioxide at $$27^{\circ}C$$ and $$5$$ atmospheric pressure. A part of the gas is removed at $$27^{\circ}C$$ and it fills a $$3L$$ container at $$1\ atm$$ and the pressure drops to $$3.5\ atm$$ in the vessel. The volume of the vessel is:
  • A. $$1\ L$$
  • B. $$5.8\ L$$
  • C. $$3.5\ L$$
  • D. $$2\ L$$

Asked in: Physics - Units and Measurement


1 Verified Answer | Published on 18th 08, 2020

View Answer
Q4 Single Correct Medium
If % error in length, diameter, current and voltage are same than which of the following affects % error in measurement of resistivity, the most:
  • A. length measurement
  • B. voltage measurement
  • C. current measurement
  • D. diameter measurement

Asked in: Physics - Units and Measurement


1 Verified Answer | Published on 18th 08, 2020

View Answer
Q5 Subjective Medium
Name any two units of length which are bigger than the metre. Write the relation 
between each of those units and the metre.

Asked in: Physics - Units and Measurement


1 Verified Answer | Published on 18th 08, 2020

View Answer