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The branch of optics dealing with the fo...

The branch of optics dealing with the formation of images using the concept of straight line propagation of light is called :

A

corpuscular optics

B

physical optics

C

geometrical optics

D

quantum optics.

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Name the branch of optics which neglects the wavelength (lambda to 0) of light.

Answer the following questions: (e) Ray optics is based on the assumption that light travels in a straight line. Diffraction effects (observed when light propagates through small apertures/slits or around small obstacles) disprove this assumption. Yet the ray optics assumption is so commonly used in understanding location and several other properties of images in optical instruments. What is the justification?

Light appears to travel in straight lines because