Relative aperture of telescope
==============================

The relative aperture of a telescope is the ratio of the diameter of the lens to its focal length.
For visual observations, high-power telescopes give a larger exit pupil size, that is, the picture
is bright and clear. A larger field of view allows you to observe extended objects, which include
many galaxies and nebulae, that is, objects from Outer Space. In turn, non-high-power telescopes
give a greater magnification, other things being equal, and are used in working with objects where
details need to be considered, that is, with planets.

**Links:**

#. `Wikipedia <https://en.wikipedia.org/wiki/F-number#Notation>`__.

.. py:currentmodule:: symplyphysics.laws.optics.relative_aperture_of_telescope

.. py:data:: relative_aperture

    :attr:`~symplyphysics.symbols.optics.relative_aperture`.

Symbol:
    :code:`A`

Latex:
    :math:`A`

Dimension:
    :code:`dimensionless`


.. py:data:: lens_diameter

    Lens :attr:`~symplyphysics.symbols.classical_mechanics.diameter`.

Symbol:
    :code:`D`

Latex:
    :math:`D`

Dimension:
    :code:`length`


.. py:data:: lens_focal_length

    Lens :attr:`~symplyphysics.symbols.optics.focal_length`.

Symbol:
    :code:`f`

Latex:
    :math:`f`

Dimension:
    :code:`length`


.. py:data:: law

    :code:`A = D / f`


    Latex:
        .. math::
            A = \frac{D}{f}