Question

Hey I need your help please so fast urgent guys❤
1) Define Centre of Curvature of the Spherical mirror.
2) Define Radius of Curvature of the Mirror.
3) Define Principal Axis.
4) Define Principal Focus of the Concave Mirror.
5) Define Principal Focus of the Convex Mirror.
6) Define Focal Length.
7) Define Aperture.​

Answer 1

Explanation:

1. Centre of curvature: Centre of curvature of a spherical mirror is the centre of the hollow sphere of glass of which the mirror is a part. ... (e) Aperture: The portion of a mirror from which the reflection of light actually takes place is called the aperture of the mirror.

2..The distance from the vertex to the center of curvature is known as the radius of curvature (represented by R). The radius of curvature is the radius of the sphere from which the mirror was cut. Finally, the distance from the mirror to the focal point is known as the focal length (represented by f).

3..a line passing through the center of the surface of a lens or spherical mirror and through the centers of curvature of all segments of the lens or mirror. Physics.

4..Light rays that are parallel to the principal axis of a concave mirror converge at a specific point on its principal axis after reflecting from the mirror. This point is known as the principal focus of the concave mirror.

5..The light rays that converge on the principal axis after reflecting from a convex mirror and are parallel to the principal axis are called principal focus of a convex mirror. They either actually in real meets or appears virtually to meet.

6..the distance between the centre of a mirror or a lens and its focus

7..Aperture refers to the opening of a lens's diaphragm through which light passes. ... Lower f/stops give more exposure because they represent the larger apertures, while the higher f/stops give less exposure because they represent smaller apertures.

Answer 2

Answer:

$lhs = ( \sqrt{3} + 1)(3 - cot30) \\ = \sqrt[3]{3} - \sqrt{3} cot + 3 - 3cot30 \\ = \sqrt[3]{3} - \sqrt{3}cot30 + \sqrt{3} \sqrt{3} - \sqrt{3} \sqrt{3} - cot30 \\ = \sqrt[3]{3} - \sqrt{3} cot30(1 + \sqrt{3} ) + 3 \\= \sqrt[3]{3} - \frac{cot30}{tan30} (1 + \sqrt{3} ) + 3 \\= \sqrt[3]{ \]{3} } - \frac{cot30}{tan30} tan45 - \frac{cot30}{tan30 \: tan30} + {cot}^{2} 30 \\ = {tan}^{3} 60° - 2sin60° = rhs$

${\boxed {\boxed {⟹LHS=RHS}}}$