ĐỊNH LUẬT PHẢN XẠ ÁNH SÁNG THE LAW OF REFLECTION Memorize The law of reflection: •A reflection ray lies in a plane containing an incident and a normal of the mirror at an incident point[r]
TIẾT ĐỊNH LUẬT PHẢN XẠ ÁNH SÁNG (THE LAW OF REFLECTION) BÀI ĐỊNH LUẬT PHẢN XẠ ÁNH SÁNG ( THE LAW OF REFLECTION) VACABULARY Reflection : Image: Incident ray: Perpendicularly: Normal: Angle: phản xạ ảnh tia tới vuông góc đường pháp tuyến góc BÀI ĐỊNH LUẬT PHẢN XẠ ÁNH SÁNG ( THE LAW OF REFLECTION) I PLANE MIRROR The image of an object observed in mirror is called the image of an object created by a plane mirror C1 Sheet metal smooth and flat, water surface, glass, II THE LAW OF REFLECTION C1 Indicate some objects which have flat, smooth surfaces and can be used to see image of our as a plane mirror BÀI ĐỊNH LUẬT PHẢN XẠ ÁNH SÁNG ( THE LAW OF REFLECTION) I PLANE MIRROR The image of an object observed in mirror is called the image of an object created by a plane mirror II THE LAW OF REFLECTION Phenomenon of light rays coming from the mirro faces in a definite direction is called light refrection phenomenon What plane does the reflected ray lie in? Conclusion: Reflected ray is in the same nomal incident ray and…………… plane with……………… C2 Observe and tell what plane does the reflected ray lie in? BÀI ĐỊNH LUẬT PHẢN XẠ ÁNH SÁNG ( THE LAW OF REFLECTION) I PLANE MIRROR II THE LAW OF REFLECTION What plane does the reflected ray lie in? S Conclution: Reflected ray is in the same plane with incident ray and normal I How is the direction of a reflected ray related to the direction of an incident ray? Angle SIN= i is called angle of incident Angle NIR= i’ is called angle of reflection IN lie perpendicularly with the mirror surface is called normal Conclusion: An angle of reflection is always equals ……….angle of incident N R Angle of incidence i 600 450 300 Angle of reflection i’ 600 450 300 BÀI ĐỊNH LUẬT PHẢN XẠ ÁNH SÁNG ( THE LAW OF REFLECTION) I PLANE MIRROR II THE LAW OF REFLECTION What plane does the reflected ray lie in? Conclusion: Reflected ray is in the same plane with incident ray and normal How is the direction of a reflected ray related to the direction of an incident ray? Conclusion: An angle of reflection is always equals angle of incident The law of reflection Angle of incidence i 600 450 300 Angle of reflection i’ 600 450 300 BÀI ĐỊNH LUẬT PHẢN XẠ ÁNH SÁNG ( THE LAW OF REFLECTION) I PLANE MIRROR II THE LAW OF REFLECTION What plane does the reflected ray lie in? How is the direction of a reflected ray related to the direction of an incident ray? The law of reflection An angle of reflection is always equals angle of incident Reflected ray is in the same plane with incident ray and normal Ketch a plane mirror and light ray C3 S Incident point N I R Plane miror BÀI ĐỊNH LUẬT PHẢN XẠ ÁNH SÁNG ( THE LAW OF REFLECTION) I PLANE MIRROR II THE LAW OF REFLECTION What plane does the reflected ray lie in? How is the direction of a reflected ray related to the direction of an incident ray? The law of reflection An angle of reflection is always equals angle of incident Reflected ray is in the same plane with incident ray and normal Ketch a plane mirror and light ray III APPLICATION S C4 I N R BÀI ĐỊNH LUẬT PHẢN XẠ ÁNH SÁNG ( THE LAW OF REFLECTION) I PLANE MIRROR II THE LAW OF REFLECTION What plane does the reflected ray lie in? How is the direction of a reflected ray related to the direction of an incident ray? The law of reflection C4 III APPLICATION I N b) S R An angle of reflection is always equals angle of incident Reflected ray is in the same plane with incident ray and nomal Ketch a plane mirror and light ray S a) I N R BÀI ĐỊNH LUẬT PHẢN XẠ ÁNH SÁNG ( THE LAW OF REFLECTION) Memorize The law of reflection: •A reflection ray lies in a plane containing an incident and a normal of the mirror at an incident point •The angle of reflection equals the angle of incident ... reflection is always equals ……….angle of incident N R Angle of incidence i 600 45 0 300 Angle of reflection i’ 600 45 0 300 BÀI ĐỊNH LUẬT PHẢN XẠ ÁNH SÁNG ( THE LAW OF REFLECTION) I PLANE MIRROR... always equals angle of incident The law of reflection Angle of incidence i 600 45 0 300 Angle of reflection i’ 600 45 0 300 BÀI ĐỊNH LUẬT PHẢN XẠ ÁNH SÁNG ( THE LAW OF REFLECTION) I PLANE MIRROR... the same plane with incident ray and normal Ketch a plane mirror and light ray III APPLICATION S C4 I N R BÀI ĐỊNH LUẬT PHẢN XẠ ÁNH SÁNG ( THE LAW OF REFLECTION) I PLANE MIRROR II THE LAW OF REFLECTION