Duduli

Answer:- It states that if a ray of light, after suffering a number of reflections and/or refractions has its path reversed, at any stage, it will retrace itself back to the source along the same path.

Answer:- It is the tendency of light (or electromagn -etic waves) to propagate in a straight line without doing any deviation through a homogeneous medium which has the same refractive index throughout .

Answer:- “Wavefront of a wave is defined as the locus of all the particles of the medium which vibrate in same phase and were disturbed at the same instant of time.”

Answer:- An eyepiece is the lens or combination of lenses used in an optical instrument through which eye views the image formed by the objective lens.

Answer:- When white light passes from one optical medium to another, different colors of the light split, and this phenomenon of splitting of light into its components as a result of refraction is called dispersion.

Answer:- In general, optical systems are made up of a large number of refracting surfaces (combination of lenses).To obtain the position of the final image due to such a system becomes complicated as the number of elements of an optical system increases.under such situations matrix method is used.