Lenses are used to form images by reflection in optical instruments.
Thus, the statement is false.
Fill in the blanks
(1) A ray of light parallel to principal axis after reflection from concave mirror passes through _______
(2) The focal length of _______ lens is positive.
(3) The image of an object is formed behind _______ in hypermetropia.
(4) An optical device used by watch repairers is _______
(5) The power of spectacle for myopic eye is_______.
In optical instruments, the lenses are used to form images by