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प्रश्न
Answer the following question.
State the assumptions on which ray optics is based.
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उत्तर
Ray optics is based on the following assumptions:
- Objects and images are situated close to the principal axis.
- Rays diverging from the objects are confined to a cone of a very small angle.
- If there is a parallel beam of rays, it is paraxial, i.e., parallel and close to the principal axis.
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संबंधित प्रश्न
Choose the correct option.
Consider the optically denser lenses P, Q, R, and S drawn below. According to the Cartesian sign convention which of these have a positive focal length?
Answer the following question.
Which phenomena can be satisfactorily explained using ray optics?
A light beam is incident at an angle twice the angle of refraction. The angle of refraction is ______.
If a lens is cut into two pieces perpendicular to the principal axis and only one part is used, the intensity of the image will be ____________.
When a ray of light enters a medium of refractive index µ, then it is observed that the angle of refraction is half the angle of incidence. The value of angle of incidence will be ____________.
