13.5 Optical Instruments

• Optical instruments use lenses, mirrors, or both to manipulate light
• Match the optical instrument with its purpose:

  Telescope ↔️ Magnifies distant objects

  Microscope ↔️ Magnifies small objects

  Camera ↔️ Captures images

  Human Eye ↔️ Allows vision
• A microscope uses refraction to magnify small objects.


  True
• What happens to light when it passes from one medium to another in refraction?

  It bends
• Optical instruments use lenses, mirrors, or both to manipulate light
• Which optical principle is used in a microscope to magnify small objects?

  Refraction
• Telescopes are used in astronomy to study distant celestial objects.


  True
• What is the formula for calculating the magnification of an optical instrument?

  $M =$$\frac{f_{o}}{f_{i}}$
• A microscope typically has a magnification range of 40x to 1000x.


  True
• Optical instruments can achieve a wide range of magnification levels by adjusting the focal lengths and positioning of the lenses and mirrors
• Optical instruments rely on the principles of refraction, reflection, and diffraction
• A telescope uses lenses or mirrors to magnify distant objects
• What is the principle by which lenses focus light in optical instruments?

  Refraction
• A camera uses lenses to focus light onto an image sensor
• What is the purpose of a telescope?

  Magnifies distant objects
• Refraction is the bending of light as it passes from one medium to another.


  True
• The human eye uses a lens to focus light onto the retina
• Steps to calculate the magnification of an optical instrument

  1️⃣ Determine the focal length of the objective lens

  2️⃣ Determine the focal length of the eyepiece lens

  3️⃣ Divide the focal length of the objective lens by the focal length of the eyepiece lens
• In the magnification formula, 'M' stands for magnification
• What is the typical magnification range of a telescope?

  20x to 600x
• What are the three primary optical principles used in optical instruments?

  Refraction, Reflection, Diffraction
• What are the three primary principles that optical instruments rely on?

  Refraction, reflection, diffraction
• The human eye is considered an optical instrument.


  True
• Arrange the working principles of optical instruments in the correct order:

  1️⃣ Refraction

  2️⃣ Reflection

  3️⃣ Diffraction
• Refraction is used in lenses to focus light.
• Diffraction is essential for creating high-resolution images.


  True
• Match the optical instrument with its purpose:

  Telescope ↔️ Magnifies distant objects

  Microscope ↔️ Magnifies small objects

  Camera ↔️ Captures images
• A telescope is designed to magnify distant objects.
• What happens to light during refraction?

  Light bends
• What is the purpose of reflection in optical instruments?

  Redirect light
• What type of light sensor is used in a camera to capture images?

  Image sensor
• In what field is a telescope primarily used?

  Astronomy
• Optical instruments have a wide range of applications in various fields.


  True
• Optical instruments enable us to magnify, focus, and capture visual information
• The formula for calculating magnification is M = \frac{f_{o}}{f_{i}}</latex>


  True
• What is the typical magnification range of a telescope?

  20x to 600x
• Limitations of optical instruments affect the quality of images they produce.


  True
• Resolution is the ability to distinguish fine details
• Adaptive optics uses deformable mirrors to correct atmospheric distortion
• Quantum optics uses quantum entanglement for ultra-sensitive imaging.


  True