Lenses can bend light to make images appear larger or smaller, upright or inverted. A lens is a transparent piece of glass or plastic with one or more curved sides. Converging lenses bring parallel rays of light together and produce real, inverted images beyond the focal point. Diverging lenses spread parallel rays of light and always form smaller, upright, virtual images on the same side as the object. Lenses have a focal point on each side and obey three rules for how rays of light pass through based on their angle of incidence.
Lenses can bend light to make images appear larger or smaller, upright or inverted. A lens is a transparent piece of glass or plastic with one or more curved sides. Converging lenses bring parallel rays of light together and produce real, inverted images beyond the focal point. Diverging lenses spread parallel rays of light and always form smaller, upright, virtual images on the same side as the object. Lenses have a focal point on each side and obey three rules for how rays of light pass through based on their angle of incidence.
Pojam i značaj energija za čovjeka.Vrste izvora energija u prirodi.Neobnovljivi i obnovljivi izvori energije.Urđaji za iskorišćavanje obnovljivih energija.Štednja energije
Light reflects off surfaces according to two laws: 1) the incident, reflected, and normal rays all lie in the same plane, and 2) the angle of incidence equals the angle of reflection. Reflection can be regular or irregular depending on the surface, but the laws apply to both; regular reflection occurs off smooth surfaces and results in upright, virtual images of the same size as the object located the same distance behind the mirror as the object is in front.
Reflection of light in spherical mirrorMUBASHIRA M
this slide contains laws and terms of reflection of light. especially the image formation and ray diagrams of spherical mirror that are mainly useful for science students
This document summarizes key concepts in ray optics and optical instruments. It discusses phenomena of light including reflection, refraction, diffraction, scattering, polarization and interference. It also covers principles of spherical mirrors and aberration, refraction of light including Snell's law and refractive index, total internal reflection and its applications. Optical instruments discussed include the eye, telescope, and applications of concepts like mirage, brilliance of diamonds, and optical fibers.
Light is a form of energy that travels at the maximum speed and in straight lines. It undergoes various phenomena like reflection, refraction, scattering, and interference. A concave mirror is a spherical mirror with a reflective convex surface that forms real, inverted images. The location and size of the image formed by a concave mirror depends on where the object is placed relative to the focal point and center of curvature of the mirror. Common uses of concave mirrors include vehicle headlights, dentistry/ENT tools, shaving mirrors, and telescopes.
Pojam i značaj energija za čovjeka.Vrste izvora energija u prirodi.Neobnovljivi i obnovljivi izvori energije.Urđaji za iskorišćavanje obnovljivih energija.Štednja energije
Light reflects off surfaces according to two laws: 1) the incident, reflected, and normal rays all lie in the same plane, and 2) the angle of incidence equals the angle of reflection. Reflection can be regular or irregular depending on the surface, but the laws apply to both; regular reflection occurs off smooth surfaces and results in upright, virtual images of the same size as the object located the same distance behind the mirror as the object is in front.
Reflection of light in spherical mirrorMUBASHIRA M
this slide contains laws and terms of reflection of light. especially the image formation and ray diagrams of spherical mirror that are mainly useful for science students
This document summarizes key concepts in ray optics and optical instruments. It discusses phenomena of light including reflection, refraction, diffraction, scattering, polarization and interference. It also covers principles of spherical mirrors and aberration, refraction of light including Snell's law and refractive index, total internal reflection and its applications. Optical instruments discussed include the eye, telescope, and applications of concepts like mirage, brilliance of diamonds, and optical fibers.
Light is a form of energy that travels at the maximum speed and in straight lines. It undergoes various phenomena like reflection, refraction, scattering, and interference. A concave mirror is a spherical mirror with a reflective convex surface that forms real, inverted images. The location and size of the image formed by a concave mirror depends on where the object is placed relative to the focal point and center of curvature of the mirror. Common uses of concave mirrors include vehicle headlights, dentistry/ENT tools, shaving mirrors, and telescopes.
2. S pomoću leće dobivamo povećanu ili umanjenu sliku predmeta.
o Možemo li s pomoću leće zapaliti vatru?
3. Optičke leće
Prozirno tijelo omeđeno plohama od kojih je bar
jedna zakrivljena zove se optička leća.
sabirna ili konvergentna leća
rastresna ili divergentna leća
4. Sabirna ili konvergentna leća
leća koja je u sredini deblja nego na rubu
Upadni snop svjetlosnih zraka paralelnih s optičkom osi nakon
prolaska kroz leću fokusira se u žarištu leće.
Skupljanje zraka u žarištu sabirne leće
5. Rastresna ili divergentna leća
leća koja je u sredini tanja nego na rubu
Ako na rastresnu leću padne snop svjetlosnih zraka paralelnih s
optičkom osi, te se zrake nakon prolaska kroz leću šire, tj. razilaze.
Rasipanje zraka svjetlosti na rastresnoj leći
6. Jakost leće
Jakost leće je recipročna vrijednost njezine
žarišne daljine.
dioptrija
-
1/m
;
1
f
j
Primjena leća :
naočale, povećalo, dalekozor, filmska kamera ...
7. Kakvu sliku predmeta daje sabirna leća?
Postavljaj predmet na različite udaljenosti od leće
i promatraj kakve slike nastaju.
8. Konstrukcija slike koju daje sabirna leća
Karakteristične zrake za konstrukciju slike:
1. Zraka paralelna s optičkom osi koja se lomi kroz žarište F.
2. Zraka kroz žarište koja se lomi paralelno s optičkom osi.
3. Zraka kroz središte leće koja se ne lomi.
12. Konstrukcija slike koju daje sabirna leća
Slika predmeta je:
virtualna, povećana i uspravna
13. Konstrukcija slike koju daje rastresna leća
Rastresna leća uvijek, bez obzira gdje postavimo predmet, daje
virtualnu, uspravnu i umanjenu sliku predmeta.
14. 1. Što su optičke leće?
2. Koja je razlika između sabirne i rastresne leće?
3. Što je jakost leće?
4. Gdje se primjenjuju leće?
