Question

define parallax.discuss angular method to determine the diameter of the planet
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Answer 1

Answer:

i am in the same situation bro 2nd ka answer kya hai please btao

Answer 2

Definition of Parallax:

• In simple words , parallax is a phenomenon in which the position of an object varies when viewed from different line of sight.

• Let's take a easy example :

• When we try measure the distance of a point from another point with a scale, if we view that point from vertically upwards we get a specific reading on the scale. But if our viewing angle is different the the reading on the scale changes.

• Another example : Refer to diagram. The value of the level of fluid on the demarcated test tube differs when viewed from different angles.

Angular Method to determine diameter of planets:

• Refer to 2nd photo

• Let diameter of planet be "d" and distance of planet from earth be D.

• Let the angle subtended be $\delta$.

$\therefore \: \tan( \delta) = \dfrac{d}{D}$

For very small angles:

$\implies \: \delta= \dfrac{d}{D}$

$\boxed{\implies \: d = D \times \delta}$

Hope It Helps.