Ask a Doubt
Request a call back

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

JEE Class main Answered

solve
question image
Asked by eknathmote50 | 08 May, 2019, 10:30: AM
answered-by-expert Expert Answer
The magnification of mirror is 2.
Thus, 
 
m = -(v/u) = - 2 ...( negative sign because image formed is inverted) 
Thus, 
v  = 2u 
 
The distance between the object and image is 12 cm.
Thus,
u - v = 12 cm 
Subtstituting,
 
u - 2u = 12 cm 
Thus, u = -12 cm 
and v = -24 cm 
 
Now using the mirror formula,
 
1 over f equals space 1 over v plus 1 over u 1 over f equals fraction numerator 1 over denominator negative 24 end fraction plus fraction numerator 1 over denominator negative 12 end fraction S o l v i n g space t h i s space w e space g e t comma space space f space equals space 8 space c m space
 
Thus, focal length of mirror is 8 cm. 
Answered by Shiwani Sawant | 08 May, 2019, 12:50: PM
Multiple Choice Questions Practice Test
Answered Unanswered My Questions My Answers
JEE main - Physics
why does the sky sometimes appear white?
Asked by beemravumarsukola | 16 Oct, 2023, 07:02: AM
ANSWERED BY EXPERT ANSWERED BY EXPERT
JEE main - Physics
in youngs double slit experiment angular width of fringes is 0.20° for sodium light in wavelength 5890A° If complete system is dipped in water , then angular width of fringes becomes
Asked by vinuthaks966 | 27 Sep, 2023, 06:07: AM
ANSWERED BY EXPERT ANSWERED BY EXPERT
JEE main - Physics
YDSE
question image
Asked by swayamagarwal2114 | 17 Jul, 2022, 12:05: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
JEE main - Physics
plz solve it
question image
Asked by 3047-manvir | 06 Jul, 2022, 07:26: AM
ANSWERED BY EXPERT ANSWERED BY EXPERT
JEE main - Physics
plz solve it
question image
Asked by 3047-manvir | 06 Jul, 2022, 07:25: AM
ANSWERED BY EXPERT ANSWERED BY EXPERT
JEE main - Physics
why it's is difficult to operate and build laser at high frequency?
Asked by 3047-manvir | 04 Jul, 2022, 12:30: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
JEE main - Physics
The maximum number of possible interference maxima for slit separation equal to twice the wavelength in ydse is ?
Asked by gokulmohan4002 | 15 May, 2022, 18:23: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
JEE main - Physics
red light and violet light are in medium in which the reflective index will be more and why
Asked by kallakurisujatha63 | 24 Feb, 2021, 15:02: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
JEE main - Physics
The source slit is moved closer to the double slit plane then what is effect on i terference fringes?
Asked by ashutosharnold1998 | 25 Aug, 2019, 01:42: AM
ANSWERED BY EXPERT ANSWERED BY EXPERT
JEE main - Physics
Refracion of light 
Asked by sameenauzair986 | 28 Jul, 2019, 17:45: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
My Class Videos Tests ₹ Plans Ask a Doubt