Advertisements
Advertisements
प्रश्न
Complete the following diagram and state what happens to the ray of light after refraction through the lens.
Advertisements
उत्तर
A ray of light that passes through the principal focus or appears to pass through the principal focus, goes parallel to its principal axis.
संबंधित प्रश्न
State the condition when a lens is called an equi-convex or equi-concave.
Study the diagram shown in Fig. 5.56
Where is the image formed?
The diagram given below shows the position of an object OA in relation to a converging lens whose foci are at F1 and F2.
Describe three characteristic of the image.
(a) Draw a sketch to show how a lens is able to produce an image of the sun on a paper screen.
(b)(i) Would you regard the rays from the sun as being divergent, parallel or convergent?
(ii) What is the name given to the point where such rays meet after they have passed through the lens?
(iii) How does the image of the sun sometimes burn a paper screen?
In the following diagram the object and the image formed by the respective lenses are shown. Complete the ray diagram, and locate the focus. Find the focal length of the lens.
Make the rrect choices in the following items :
An object is placed 50 cm from a connverging lens of focal length 30 cm. The image produced would be
Make the rrect choices in the following items :
ln fig, , a real image of a point objert O is formed, Which of the following statements is true about each of the arrangements?
(i) The object is at the principle focus of the lens
(ii) The focal length of the lens is 17 cm
(iii) lf the mirror is moved so that it is 6 cm from the lens image will also move
Make the correct choices in the following items:
lf the image can be focused on a screen it must be
Define the term focus of a lens.
Complete the following diagram and state what happens to the ray of light after refraction through the lens.
