Parallax Method
Trending Questions
Q. If the average life of a person is taken s 100s, the age of universe in this scale is of the order {(a)}10^{10}s (b)10^8s (c)10^{17}s (d)10^9s
Q. The nearest star to our solar system is 4.29 light years away. How much is this distance in terms of parsecs? How much parallax would this star (named Alpha Centauri) show when viewed from two locations of the Earth six months apart in its orbit around the Sun ?
Q. 50.A student perform an experiment of measuring the thickness of a slab with a vernier callipers whose 50 division of the vernier scale are equal to 49 division of main scale. He noted that zero of the vernier scale is between 7cm and 7.05cm mark of the main scale and 23rd division of the vernier scale exactly coincides with the main scale. What is the measured value of the thickness of the given slab using the vernier callipers ?
Q. The principle of ‘parallax’ in section 2.3.1 is used in the determination of distances of very distant stars. The baseline AB is the line joining the Earth’s two locations six months apart in its orbit around the Sun. That is, the baseline is about the diameter of the Earth’s orbit » 3 × 10¹¹m. However, even the nearest stars are so distant that with such a long baseline, they show parallax only of the order of 1” (second) of arc or so. A parsec is a convenient unit of length on the astronomical scale. It is the distance of an object that will show a parallax of 1” (second of arc) from opposite ends of a baseline equal to the distance from the Earth to the Sun. How much is a parsec in terms of metres ?
Q. It is a well known fact that during a total solar eclipse the disk of the moon almost completely covers the disk of the Sun. From this fact and from the information you can gather from examples 2.3 and 2.4, determine the approximate diameter of the moon.
Q. The farthest objects in our Universe discovered by modern astronomers are so distant that light emitted by them takes billions of years to reach the Earth. These objects (known as quasars) have many puzzling features, which have not yet been satisfactorily explained. What is the distance in km of a quasar from which light takes 3.0 billion years to reach us ?
Q. 45.the moon revolves around the earth 13 times in one year .if the ratio of sun-earth distance to earth moon distance is 392, then the ratio of the masses of sun and earth will be
Q. Explain this common observation clearly : If you look out of the window of a fast moving train, the nearby trees, houses etc. seem to move rapidly in a direction opposite to the train’s motion, but the distant objects (hill tops, the Moon, the stars etc.) seem to be stationary. (In fact, since you are aware that you are moving, these distant objects seem to move with you).
Q. 45.A bird flies from a point A(-1, 2, 3) to a point B(2, -1, -2).Find the displacement of the bird
Q.
An asteroid is going to hit the Earth. To calculate its distance it is observed from 2 diametrically opposite points A, B on Earth. The angle subtended at the asteroid by these two directions of observations is 2o. Given the diameter of Earth to be about 1.276×107 m. compute the distance of the asteroid.
3.75×108 m
3.85×108 m
3.65×108 m
none of these
Q. 12.Why infitesemally small angular displacement isa vectors whereas finite displacement is a scalar
Q. 36. Why infitesemally small angular displacement isa vectors whereas finite displacement is a scalar
Q.
An asteroid is going to hit the Earth. To calculate its distance it is observed from 2 diametrically opposite points A, B on Earth. The angle subtended at the asteroid by these two directions of observations is 2o. Given the diameter of Earth to be about 1.276×107 m. compute the distance of the asteroid.
Q. how to take VERNIER SCALE READING and find length of object ?
Q. Calculate the parallax of a star (in sec) at the distance of 4.29 light years when viewed from two locations of earth six months apart in its orbit around the sun. Answer upto 2 places of decimal
