Advertisements
Advertisements
प्रश्न
Distinguish between a convex lens and concave lens. Which of the two is a converging lens : convex lens of concave lens?
उत्तर
| Convex Lens | Concave Lens |
| 1.A convex lens converges or concentrates the light rays to a point. | 1. A concave lens diverges the rays passing through it. |
| 2.A convex lens has a real focus. | 2.A concave lens has a virtual focus. |
| 3.A convex lens has a positive focal length. | 3.A concave lens has a negative focal length. |
A convex lens is a converging lens .
APPEARS IN
संबंधित प्रश्न
To determine the approximate focal length of the given convex lens by focussing a distant object (say, a sign board), you try to focus the image of the object on a screen. The image you obtain on the screen is always
(a) erect and laterally inverted
(b) erect and diminished
(c) inverted and diminished
(d) virtual, inverted and diminished
A convex lens of focal length 8 cm forms a real image of the same size as the object. The distance between object and its image will be:
(a) 8 cm
(b) 16 cm
(c) 24 cm
(d) 32 cm
State two applications of a convex lens.
i. Which type of microscope has the arrangement of lenses shown in the adjoining figure?
ii. Label the figure correctly.
iii. Write the working of this microscope.
iv. Where does this microscope used?
v. Suggest a way to increase the efficiency of this microscope.
The image obtained while finding the focal length of convex lens is ....................
State the nature and position of the object on the principal axis to obtain a virtual and magnified image.
Draw a diagram to show the convergent action of a convex lens by treating it as a combination of glass block and two triangular glass prisms, with the aid of two parallel incident rays.
- In which type of microscope do you find the lens arrangement as shown in the following diagram?
- Write about the working and the use of this microscope.
Distinguish between:
Concave lens and Convex Lens
Distinguish between:
Concave lens and Convex lens
