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Misconception: We always choose the right hand side as the positive direction of sign convention.
FACT: Whenever there is change in direction of light, we reverse the direction of sign convention.
This is generally observed where reflecting surfaces are involved. The image formed by a refracting medium, say a lens, becomes an object for the reflecting surface (a spherical or a plane mirror). So we modify the sign convention accordingly and use the respective formulae.
FACT: Whenever there is change in direction of light, we reverse the direction of sign convention.
This is generally observed where reflecting surfaces are involved. The image formed by a refracting medium, say a lens, becomes an object for the reflecting surface (a spherical or a plane mirror). So we modify the sign convention accordingly and use the respective formulae.
