Advertisements
Advertisements
प्रश्न
A ray of light incident on a lens parallel to its principal axis, after refraction passes through or appears to come from ______.
पर्याय
Its first focus
Its optical entre
Its second focus
The centre of curvature of its second surface
Advertisements
उत्तर
A ray of light incident on a lens parallel to its principal axis, after refraction passes through or appears to come from its second focus.
APPEARS IN
संबंधित प्रश्न
Explain optical centre of a lens with the help of proper diagram(s).
A ray of light after refraction through a lens emerges parallel to the principal axis of the lens. The incident ray either passes through ______.
In the diagram below, XX’ represents the principal axis, O the optical centre and F the focus of the lens. Complete the path of rays A and B as they emerge out of the lens.
 |
 |
| (a) | (b) |
Study the diagram shown in Fig. 5.56
Where is the image formed?
A ray of light incident at the optical centre of lens, passes undeviated after refraction.
For an object placed at a distance 20 cm in front of a convex lens, the image is at a distance 20 cm behind the lens. The focal length of the convex lens is ______.
Make the correct choices in the following items:
lf the image can be focused on a screen it must be
How will you differentiate between a convex and a concave lens by looking at a distant object.
How will you differentiate between a convex and a concave lens by looking at a printed page?
Complete the following diagram and state what happens to the ray of light after refraction through the lens.
