What is parallax?

What is the parallax error?

What is anaphylaxis? What are the symptoms of it?

An object is placed in front of a convex mirror at a distance of 50cm. A plane mirror is introduced covering the lower half of the convex mirror. If the distance between the object and the plane mirror is 30cm, it is found that there is no parallax between the images formed by the two mirrors. What is the radius of curvature of the convex mirror?

In figure , L is half part of an equiconvex glass lens (mu=1.5) whose surfaces have radius of curvature R =40cm and its right surface is silvered . Normal to its principal axis a plane mirror M is placed on right of the lens . Distance between lens L and mirror M is b. A small object O is placed on left of the lens such that there is no parallax between final images formed by the lens and mirror. If transverse length of final image formed by lens is twice that of image formed by the mirror , calculate distance'a' in cm between lens and object.

(a) What is a slag ? (b) What is meant by the term 'Pyrometallurgy' ?

What is carbylamine reaction and what is its significance ?

Explain parallax.

How is the method of parallax used to find the distance of a planet.

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.

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 the parallax method , in meters is