Advertisements
Advertisements
प्रश्न
Explain the following term related to spherical lenses:- aperture
Advertisements
उत्तर
Aperture:-
The diameter of sphere of part of which a lens is formed is called the aperture.
संबंधित प्रश्न
Define the following term in the context of spherical mirrors:- Centre of curvature
Explain the following term related to spherical lenses: focal length
A student obtained on a screen the sharp image of a candle flame placed at the farther end of laboratory table using a concave mirror. For getting better value of focal length of the mirror, the teacher suggested to him to focus the sun. What should the student do?
(A) Should move the mirror away from the screen.
(B) Should move the mirror towards the screen.
(C) Should move the mirror and screen both towards the sun.
(D) Should move only the screen towards the sun.
Mention the types of mirrors used as (i) rear view mirrors, (ii) shaving mirrors. List two reasons to justify your answers in each case.
Complete the following diagrams in Figure by drawing the reflected rays for the incident rays 1 and 2.
State whether the image in part (a) is real or virtual?
The magnification for a mirror is -3. How are u and v related?
The sun is seen before the sunrise and after the sunset.
Define the term Principle focus.
