Explain each of them briefly :
⏩ Pole
⏩ Focal length
⏩ Angle of Incidence
⏩ Angle of reflection
Disclaimer - No irrelevant answers.
rockingangle:
pole is the centre of reflecting surface
focal length is the line joining focus and pole
angle of incidence is the angle made by normal and incidence ray
angle of reflection is the angle made by normal and reflecting ray
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✳ Pole
The central point of the reflecting surface of a spherical mirror is termed as the pole. It lies on the mirror and is denoted by the letter (P).
✳focal length
Focal length is the distance between the pole of a mirror or a lens to the focus of the mirror or the lens.
For a concave mirror and a concave lens the focal length is negative. While the focal length for convex mirror and convex lens is positive. The focal length of a plane mirror is infinity.
The focal length is related to the object distance (u) and image distance (v) as well as the curvature of the reflecting surface.
The focal length for a mirror is given by,
f = R/2, R is the radius of curvature of the mirror.
1/f = 1/v + 1/u
The focal length of a lens is given by,
1/f = ( -1)(1/R1+ 1/R2)
is the refractive index of the material, R1and R2are the radii of curvature of the spherical surfaces of the lens.
Also,
1/f = 1/v 1/u
✳Angle of Incidence
The angle made by the incident ray with the normal is called angle of incidence.
Here, i is the angle of incidence.
here
pic available
✳Angle of reflection
The angle made by a reflected ray with perpendicular to reflecting surface is called
Angle of reflection
I hope sir this help u✳✳✳✳:-)
The central point of the reflecting surface of a spherical mirror is termed as the pole. It lies on the mirror and is denoted by the letter (P).
✳focal length
Focal length is the distance between the pole of a mirror or a lens to the focus of the mirror or the lens.
For a concave mirror and a concave lens the focal length is negative. While the focal length for convex mirror and convex lens is positive. The focal length of a plane mirror is infinity.
The focal length is related to the object distance (u) and image distance (v) as well as the curvature of the reflecting surface.
The focal length for a mirror is given by,
f = R/2, R is the radius of curvature of the mirror.
1/f = 1/v + 1/u
The focal length of a lens is given by,
1/f = ( -1)(1/R1+ 1/R2)
is the refractive index of the material, R1and R2are the radii of curvature of the spherical surfaces of the lens.
Also,
1/f = 1/v 1/u
✳Angle of Incidence
The angle made by the incident ray with the normal is called angle of incidence.
Here, i is the angle of incidence.
here
pic available
✳Angle of reflection
The angle made by a reflected ray with perpendicular to reflecting surface is called
Angle of reflection
I hope sir this help u✳✳✳✳:-)
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Bonjour!
All the things that you have asked about is related to mirror!
1) Pole: It is the centre of a concave or a convex mirror.(represented by P).
2) Focal length : When we pass parallel rays on a convex or a concave mirror or lens these rays met or appears to met at a point on the principal axis that is known as focus and the distance from the pole to focus is known as focal length.(represented by f).
3) Angle of incidence: When a ray is given or passed on a mirror is known as angle of incidence.(Angle passed)(represented by i).
4) Angle of reflection: The angle that is reflected back from a mirror is known as angle of reflection.(Angle reflected)(represented by r).
Hope this helps...:)
All the things that you have asked about is related to mirror!
1) Pole: It is the centre of a concave or a convex mirror.(represented by P).
2) Focal length : When we pass parallel rays on a convex or a concave mirror or lens these rays met or appears to met at a point on the principal axis that is known as focus and the distance from the pole to focus is known as focal length.(represented by f).
3) Angle of incidence: When a ray is given or passed on a mirror is known as angle of incidence.(Angle passed)(represented by i).
4) Angle of reflection: The angle that is reflected back from a mirror is known as angle of reflection.(Angle reflected)(represented by r).
Hope this helps...:)
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