Ray Optics & Optical Instruments in One Shot (NCERT)

# Ray Optics & Optical Instruments in One Shot (NCERT) Video Lecture | Physics Class 12 - NEET

## Physics Class 12

158 videos|453 docs|185 tests

## FAQs on Ray Optics & Optical Instruments in One Shot (NCERT) Video Lecture - Physics Class 12 - NEET

 1. What is the principle of ray optics?
Ans. The principle of ray optics states that light travels in straight lines called rays. These rays can be reflected, refracted, or absorbed by various optical instruments and materials.
 2. What is the difference between reflection and refraction?
Ans. Reflection occurs when light bounces off the surface of an object, following the law of reflection. Refraction, on the other hand, happens when light passes through a medium and changes direction due to the change in its speed.
 3. How does a convex lens work?
Ans. A convex lens is thicker in the middle and thinner at the edges. When light passes through a convex lens, it converges towards a focal point on the other side of the lens. This property enables convex lenses to magnify objects and correct certain vision problems.
 4. What is the purpose of an optical instrument?
Ans. Optical instruments are designed to manipulate light in order to enhance our ability to see or measure objects. They are used in various fields such as astronomy, microscopy, photography, and medicine.
 5. How does a microscope work?
Ans. A microscope uses a combination of lenses to magnify small objects that are otherwise difficult to see with the naked eye. The objective lens collects light from the specimen and forms a real, enlarged image. The eyepiece lens then further magnifies this image, allowing the viewer to see fine details.

## Physics Class 12

158 videos|453 docs|185 tests

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