The brightness of the image

Related MCQs

• The real image of an object formed by the objective, must lie
• While viewing through a level telescope and moving the eye slightly, a relative movement occurs between the image of the levelling staff and the cross hairs. The instrument is
• In internal focusing telescope brilliancy of image reduces due to extra internal lens.
• When the image formed by the objective is not situated in the plane of cross-hairs,
• The real image of an object formed by the objective must lie at the centre of telescope.
• If the definition of a telescope is poor, it will produce a clear and district image.
• The image formed by the objective in the plane of cross hairs is
• The capacity of telescope of producing a sharp image is called its
• The magnification of a telescope is the ratio of the angle subtended at the eye by the virtual image of the object to that subtended by the object.
• The image produced by the telescope will be dull, if it has