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omega360
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hello,
how can i find out the angle of deviation for plano-concave lenses.
thanks
how can i find out the angle of deviation for plano-concave lenses.
thanks
omega360 said:hello,
how can i find out the angle of deviation for plano-concave lenses.
thanks
Still didn't get how i could derive how much angle light would deviate after it passes through the lens. also what if the rays are parallel to the principal axis. what would be angle 'q'??That's an odd application, but in any case, the calculation is the same for plano-convex and plano-concave. The cone angle of light 'q' (given by the numerical aperture NA = sin(q) for a lens in air) is the ratio of focal length 'f' to lens diameter 'D': NA = 2*D/f. So sin(q) = 2*D/f, and the cone angle the inverse sine of 2*D/f. The focal length is calculated from the radius of curvature of the curved face.
The angle of deviation in optics is the angle between the incident ray and the refracted ray as they pass through a medium with a different refractive index. It is a measure of the bending of light as it travels through a medium.
The angle of deviation can be calculated using Snell's Law, which states that the ratio of the sine of the angle of incidence to the sine of the angle of refraction is equal to the ratio of the refractive indices of the two media.
The angle of deviation is affected by the refractive indices of the two media, the angle of incidence, and the wavelength of light. It also depends on the material properties of the medium, such as density and temperature.
The angle of deviation is an important concept in optics and is used to understand the behavior of light as it passes through different media. It is also used in the design and analysis of optical instruments, such as lenses and prisms.
Yes, the angle of deviation can be negative if the refracted ray bends towards the normal instead of away from it. This can happen when light passes from a less dense medium to a more dense medium, or when the angle of incidence is greater than the critical angle.