Ask a Doubt
Request a call back

Join NOW to get access to exclusive study material for best results

CBSE Class 10 Answered

We wish to obtain an equal sized inverted image of a candle flame on a screen kept at a distance of 4m from the candle flame.  (a) What should be the focal length of the lens? 
question image
Asked by sm1980agrawal | 23 Feb, 2020, 07:31: AM
answered-by-expert Expert Answer
(a) Type of lens :- Converging or convex lens
 
(b) If F is focal length, then candle (object ) is placed at a distance 2F from lens .
Image with magnification m = -1 is formed at other side of lens at a distance 2F from lens.
 
Hence 4F = 4 m ,  focal length of lense = 1 m , Candle is placed at a distance 2 m
 
Answered by Thiyagarajan K | 23 Feb, 2020, 08:53: AM

Application Videos

Concept Videos

Multiple Choice Questions Practice Test Subjective Questions Webinar Subjective Questions Pre Board Assessment
Answered Unanswered My Questions My Answers
CBSE 10 - Physics
An object is kept at a distance of 15 cm from a (a) Convex mirror (b) Plane mirror The focal length of the convex mirror and the concave lens are 10 cm each. Draw the appropriate ray diagrams, showing the formation of image, in each of the three cases.
Asked by susrisangita792 | 02 Jun, 2023, 08:00: AM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 10 - Physics
Very Short Answer Type Questions Name two mirrors used in this fair shop. Name the mirror in which the size of image is small.
Asked by susrisangita792 | 01 Jun, 2023, 06:25: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 10 - Physics
can a convex mirror ever form a real image? If yes, under what condition?  
Asked by supriyarakshit.npph | 31 May, 2023, 08:49: AM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 10 - Physics
what is refraction  
Asked by deepbhagat1090 | 13 May, 2023, 09:40: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 10 - Physics
the angle between an incident ray and the reflecting surface is 55°. what will be the total angle between the incident and reflected ray?
Asked by ruchipandey20071978 | 11 May, 2023, 06:53: AM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 10 - Physics
What are the values of the angle of incidence, and the angle of reflection for normal incidence on the plane mirror surface?
Asked by anuskakuhu | 21 Mar, 2023, 11:50: AM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 10 - Physics
Please answer ... The hydroelectric capacity of Koyna dam is ______ a) 2400 MW  b) 1960 MW  c) 1900 MW  d) 1961 MW 
Asked by Shiwani.Sawant | 20 Mar, 2023, 02:53: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 10 - Physics
Write the name of a small satellite made by a group of students from COEP (college of engineering, Pune) sent to space through ISRO in 2016.
Asked by Arun | 18 Mar, 2023, 09:13: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 10 - Physics
The power of convex lens of focal length 20 cm is
question image
Asked by varma.renu9481 | 17 Mar, 2023, 06:28: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 10 - Physics
a concave mirror has a radius of curvature of 0.4m. find the position and size of the image of an object placed 0.2m high and is placed 0.8m in front of a concave mirror.
Asked by priyanshdhiman2008 | 17 Mar, 2023, 09:17: AM
ANSWERED BY EXPERT ANSWERED BY EXPERT
My Class Videos Tests ₹ Plans Ask a Doubt