Light of 6000 Å is incident on a circular hole and is received on a screen 50 cm away. What is the radius of the hole, if the intensity of light on the screen is 4 times the intensity without the hole?

Optics topics include: Dispersion, fermats principles and its applications, lenses, light emission mechanism, holography, polarization, optical instruments, light velocity, light, resolving power, fresnel and fraunhofer diffraction. Optics is a branch of physics that studies the properties and behavior of light, including how it interacts with matter and how instruments that detect or use light are constructed. Optics typically describes the behavior of infrared, ultraviolet, and visible light. Here are some basics of optics: Refraction: When a beam of light crosses the boundary between... Show more

Optics topics include: Dispersion, fermats principles and its applications, lenses, light emission mechanism, holography, polarization, optical instruments, light velocity, light, resolving power, fresnel and fraunhofer diffraction.

Optics is a branch of physics that studies the properties and behavior of light, including how it interacts with matter and how instruments that detect or use light are constructed. Optics typically describes the behavior of infrared, ultraviolet, and visible light.

Here are some basics of optics:

Refraction: When a beam of light crosses the boundary between two different materials, its path changes depending on the difference in the materials' refractive indices. The greater the difference, the greater the refraction of the beam.
Total internal reflection: This is the basic principle used in optical fibers. When light passes from a medium with a high refractive index to another medium with a lower refractive index, it bends or refracts away from the normal.
Reflection: This is a basic concept of optics that states that when the direction of a wave changes at the interface of two mediums, and the wave returns to the medium it originated from, the process is called reflection.
Interference: This is an essential phenomenon in optics that has many practical applications, such as in the operation of lasers and the creation of diffraction gratings.
Prisms: These are used to refract or bend light in a specific direction. This property is based on the refractive index of the material from which the prism is made

Optical instruments are used to study the behavior of light and its interaction with matter. They are used in various fields such as medicine, astronomy, and engineering.

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