Question

Match the entries in column A with appropriate one from column B.

Answer 1

(A) : Plane mirror always forms an erect image of same height as that of object i.e with magnification one.

(B) : Virtual and magnified image can be obtained by using a convex lens.

(C) : Spectroscope is used to observe and study spectrum and the phenomenon is knows as spectroscopy.

(D) : Sky appears blue because of atmospheric scattering of light.

(E) : RBG i.e red, blue and green are considered as primary colours.

(F) : Optic fibre works on the phenomenon of total internal reflection.

(G) : Solid angle in a sphere is $4\pi$ steradians.

(H) : Burglar alarm worls on photoelectric effect.

(I) : Raman scattering or Raman effect is the inelastic (or incoherent) scattering of a photon upon interacting with matter.

(J) : Erecting lens is used in terrestrial telescope.