Notifications
Clear all
The image of a candle flame formed by a lens is obtained on a screen placed on the other side of the lens. If the image is three times the size of the flame and the distance between lens and image is 80 cm, at what distance should the candle be place...
Light Reflection and Refraction
1
Posts
2
Users
0
Likes
222
Views
0
03/12/2020 12:58 pm
Topic starter
![Tulika pia Tulika pia](http://eanshub.com/wp-content/uploads/wpforo/avatars/tulika-pia_3646.jpg)
The image of a candle flame formed by a lens is obtained on a screen placed on the other side of the lens. If the image is three times the size of the flame and the distance between lens and image is 80 cm, at what distance should the candle be placed from the lens? What is the nature of the image at a distance of 80 cm and the lens?
Answer
Add a comment
Add a comment
Topic Tags
1 Answer
0
03/12/2020 1:02 pm
![Kinjal ray Kinjal ray](http://eanshub.com/wp-content/uploads/wpforo/avatars/kinjal-ray_3647.jpg)
m = hl/ho = v/u for a lens
Image is real, m = -3 = v/u
With v = 80 cm, u = v/-3 = 80/-3 cm and the lens will be convex.
Add a comment
Add a comment
Forum Jump:
Related Topics
-
What is meant by power of accommodation of the eye?
3 years ago
-
A doctor has prescribed a corrective lens of power +1.5 D. Find the focal length of the lens. Is the prescribed lens diverging or converging?
3 years ago
-
Find the focal length of a lens of power -2.0 D. What type of lens is this?
3 years ago
-
An object of size 7.0 cm is placed at a distance of 27 cm in front of a concave mirror of focal length 18 cm. At what distance from the mirror should a screen be placed so that a sharp focussed image can be obtained? Find the size and nature of the i...
3 years ago
-
An object 5.0 cm in length is placed at a distance of 20 cm in front of a convex mirror of radius of curvature 30 cm. Find the position of the image, its nature and size.
3 years ago
Topic Tags:
class 10 (8819)
,
cbse (15084)
,
ncert exemplar (1417)
,
light reflection (207)
,
refraction (207)
,
Forum Information
- 321 Forums
- 27.3 K Topics
- 53.8 K Posts
- 1 Online
- 12.4 K Members
Our newest member: Stripchat
Forum Icons:
Forum contains no unread posts
Forum contains unread posts
Topic Icons:
Not Replied
Replied
Active
Hot
Sticky
Unapproved
Solved
Private
Closed