Class 10th physics chapter 12 notes for PDF download
reflection and state laws of reflection.
• solve problem is image of location using by spherical mirror by using mirror formula.
describe the passage of light through parallel-sided transparent material.
• define power of a lens and its unit.
Science, Technology and Society Connections
The students will be able to:
dentist mirror.
* * describe the use ofoptical fibres in telecommunications and medical field and state
the advantages of their use.
• The uses of a single lenses a magnifyer glass and in camera, projectors
and photographics enlarger and draw ray diagrams to show how each forms an image.
describe the use oflenses/contact lenses for rectifying vision defects of the human eye
distant celestial bodies by telescopes.
class 10th physics solutions
class 10th physics book and notes
SUMMARY
• When light travelling in a certain medium falls on the surface of This is called reflectic
light. There aretwo laws ofreflection:
i. The incidentray, the reflectedray, and the normalalllie in the same plane.
i.The angle ofincidence isequaltothe angle ofreflection(i.e., i=r).
• Like plane surfaces, spherical surfaces also reflect light satisfying the
laws ofreflection.
• In mirrors, image formation takes place through reflection of light while
lenses image is formed through refraction oflight.
• The equation relating the distance of the object p from the mirror/len
distance of the image q and the focal length f of the mirror/lens is calle
mirror/lensformula, given by 1 1 1
= -
• Magnification of a spherical mirror or thin lens is defined as "the ratio of the
＿ Image height ＿ h
image height to theobjectheight." i.e., Magnification m = Object height h
"Dioptre is the SI unit
denoted by a symbol D. Iff is expressed in metres so that 1 D = 1 m1. Thus, 1 Diopte
• The refractive index'n' of a material is the ratio of the speed of light 'c' in air to the
speed of light'v' in the material, thus
Speed of light in air
n =
C
Speed of light in medium
V
• The bending oflight from its straight path as it passes from one medium into anothe
is called refraction.
• Refraction of light takes place under two laws called laws of refraction. These af
stated as: The ray of incidence
Important Slos bassed
*REFLECTION OF LIGHT
*LAWS OF REFLECTION
*SPHERICAL MIRRORS
*CONCAVE MIRROR
*CONVEX MIRROR
*FOCAL LENGTH
*SPHERICAL MIRROR FORMULA
*REFRACTION OF LIGHT
*LAWS OF REFRACTION
*TOTAL INTERNAL REFLECTION
*OPTICAL FIBRE
*REFRACTION THROUGH PRISM
*LENSES
*IMAGE FORMATION BY LENSES
*IMAGE LOCATION BY LENS EQUATION
*SIMPLE MICROSCOPE
*COMPOUND MICROSCOPE
*TELESCOPE
*THE HUMAN EYE
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