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What is parallax method?

Important Questions on Physical World and Measurement

EASY
Physics>Mechanics>Physical World and Measurement>Measurement of Length, Mass and Time
The nearest star to our solar system is 4.3 light years away. The distance of this star in Parsec is (Mean distance between the earth and the sun =1.5×1011 m and one light year =9.46×1015 m
HARD
Physics>Mechanics>Physical World and Measurement>Measurement of Length, Mass and Time
A person in front of a mountain is beating a drum at the rate of 40 per minute and hears no distinct echo. If the person moves 90 m closer to the mountain, he has to beat the drum at 60 per minute to not hear any distinct echo. The speed of sound is
 
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Physics>Mechanics>Physical World and Measurement>Measurement of Length, Mass and Time
The dimension of light year
MEDIUM
Physics>Mechanics>Physical World and Measurement>Measurement of Length, Mass and Time
A person observes that the full length of a train subtends an angle of 15°. If the distance between the train and the person is 3 km, the length of the train, calculated using parallax method, in meters is
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Physics>Mechanics>Physical World and Measurement>Measurement of Length, Mass and Time

The moon subtends an angle of 57 min at the base-line equal to the radius of the earth. What is the distance of the moon from the earth?
[radius of the earth=6.4×106 m]

MEDIUM
Physics>Mechanics>Physical World and Measurement>Measurement of Length, Mass and Time
The moon's distance from the earth is 360000 km and its diameter subtends an angle of 42' at the eye of the observer. The diameter of the moon is
MEDIUM
Physics>Mechanics>Physical World and Measurement>Measurement of Length, Mass and Time
Compressional wave pulse are sent to the bottom of sea from a ship and the echo is heard after 2 s. If bulk modulus of elasticity of water is I2×109N m-2and mean temperature is 4°C, the depth of the sea will be
EASY
Physics>Mechanics>Physical World and Measurement>Measurement of Length, Mass and Time
A person observes that the full length of a train subtends an angle of 15°. If the distance between the train and the person is 3 km, the length of the train, calculated using parallax method, in meters is
MEDIUM
Physics>Mechanics>Physical World and Measurement>Measurement of Length, Mass and Time
From parallax measurement, the sun is found to be at a distance of about 400 times of earth-moon distance. Estimate the ratio of sun-earth diameters.
EASY
Physics>Mechanics>Physical World and Measurement>Measurement of Length, Mass and Time
The moon subtends an angle of 57 min at the base-line equal to the radius of the earth. What is the distance of the moon from the earth? [radius of the earth=6.4×106 m]
EASY
Physics>Mechanics>Physical World and Measurement>Measurement of Length, Mass and Time
The angular diameter of the sun is 1920". If the distance of the sun from the earth is 1.5×1011 m, then the linear diameter of the sun is
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Physics>Mechanics>Physical World and Measurement>Measurement of Length, Mass and Time
To measure the distance of a planet from the earth which method is used?
 
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Physics>Mechanics>Physical World and Measurement>Measurement of Length, Mass and Time
Star A is farther than star B. Which star will have a large parallax angle? 
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Physics>Mechanics>Physical World and Measurement>Measurement of Length, Mass and Time
The angular diameter of the sun is 1920". If the distance of the sun from the earth is 1.5×1011 m, then the linear diameter of the sun is
MEDIUM
Physics>Mechanics>Physical World and Measurement>Measurement of Length, Mass and Time
Moon is seen to be of 1/2° diameter from the earth. What must be the relative size of the moon as compared to the earth.
MEDIUM
Physics>Mechanics>Physical World and Measurement>Measurement of Length, Mass and Time
The earth-moon distance is about 60 times the earth radius. What will be the diameter of earth (approximately in degrees) as seen from the moon.
EASY
Physics>Mechanics>Physical World and Measurement>Measurement of Length, Mass and Time
How will you measure the diameter of the Moon using the parallax method?
EASY
Physics>Mechanics>Physical World and Measurement>Measurement of Length, Mass and Time
A person observes that the full length of a train subtends an angle of 15°. If the distance between the train and the person is 3 km, the length of the train, calculated using the parallax method, in meters is:
EASY
Physics>Mechanics>Physical World and Measurement>Measurement of Length, Mass and Time
To measure the distance of a planet from the earth..............method is used.
EASY
Physics>Mechanics>Physical World and Measurement>Measurement of Length, Mass and Time
Cotyledons are also called-