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Assertion : Parallax method cannot be u...

Assertion : Parallax method cannot be used for measuring distance of stars morer then 100 light year away.
Reason : Because parallax angle reduces so much that it cannot be measured accurately.

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What is parallax method? How is it used to measure large distances?

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SL ARORA-Units and Measurements-Exercise
  1. What is meant by angular diameter of moon ? What is its value?

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  2. For a given base line, which will show a grater parallax - a distant s...

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  3. Assertion : Parallax method cannot be used for measuring distance of ...

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  4. What is the difference between nm, mN, Nm ?

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  5. Do all physical quantities have dimensions? If no, name three physcia...

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  6. If 'slap' times speed equals power, what is the dimensional formula fo...

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  7. What is the SI unit of linear momentum?

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  8. Using the principle of homogeneity of dimensions, which of the followi...

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  9. In S=a+bt+ct^2. S is measured in metres and t in seconds. The unit of ...

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  10. What are the dimensions of a and b in the relation F = at + b x, whrer...

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  11. Name the physical quantites having dimensions [M^1 L^2 T^(-2)].

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  12. Write three physical quantities having dimensions [ML^-1 T^-2].

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  13. If the units of force and length are doubled, then the unit of energy ...

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  14. The velocity of a body is given by v=At^2+Bt+C. If v and t are express...

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  15. The retadation experienced by a moving motor boat after its, engine is...

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  16. The SI unit of energy is J = kg m^2 s^(-2), that of speed upsilon is m...

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  17. The SI unit of energy is J = kg m^2 s^(-2), that of speed upsilon is m...

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  18. The SI unit of energy is J = kg m^2 s^(-2), that of speed upsilon is m...

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  19. The SI unit of energy is J = kg m^2 s^(-2), that of speed upsilon is m...

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  20. The SI unit of energy is J = kg m^2 s^(-2), that of speed upsilon is m...

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