7/25/2019 optics.pptx

1/8

OPTICS

7/25/2019 optics.pptx

2/8

OPTICS

Optics, branch of physical science dealing wpropagation and behavior of light. In a general sethat part of the electromagnetic spectrum that ete

rays to microwaves and includes the radiant eproduces the sensation of vision. The study of opticinto geometrical optics and physical optics, branches are discussed below.

7/25/2019 optics.pptx

3/8

"#O$#T%IC&' OP

This area of optical science concerns the applicatiore(ection and refraction of light in the design of Lensesbelow* and other optical components of ins

a light ray that is traveling through one homedium is incident on the surface of a second homedium, part of the light is re(ected and part masecond medium as the refracted ray and may oundergo absorption in the second medium.

7/25/2019 optics.pptx

4/8

S+#''S '&-

This important law, named after utch mat-illebrord Snell, states that the product of the refraand the sine of the angle of incidence of a ray in o

is e/ual to the product of the refractive inde andthe angle of refraction in a successive mediumincident ray, the refracted ray, and the normboundary at the point of incidence all lie in the sam

7/25/2019 optics.pptx

5/8

P%IS$

If light passes through a prism, a transparent ob0ect with surfaces at angles to one another, the eit ray is no longthe incident ray. 1ecause the refractive inde of a substanthe di2erent wavelengths, a prism can spread out

wavelengths of light contained in an incident beam spectrum. In 3ig. 4, the angle C1 between the path of theand the path of the emergent ray is the angle of deviationthe incident ray ma5es with the normal is e/ual to the anthe emergent ray, the deviation is at a minimum. The refrathe prism can be calculated by measuring the angle

deviation and the angle between the faces of t

7/25/2019 optics.pptx

6/8

C%ITIC&' &+"'

"iven that a ray is bent away from the normal when it edense medium and that the deviation from the normal incangle of incidence increases, an angle of incidence eists,

critical angle, such that the refracted ray ma5es an angle ofnormal to the surface and travels along the boundary betwmedia.

7/25/2019 optics.pptx

7/8

P9:SIC&' OPTIC

This branch of optical science concerns the study of the plight, interference and di2raction, and the spectrcomposition, and absorption of light.

7/25/2019 optics.pptx

8/8

PO'&%I