Rohit placed a pencil perpendicular to principal axis in front of a converging
mirror of focal length 30 cm. The image formed is twice the size of the pencil.
Calculate the distance of the object from the mirror.

Answers

Answer 1

Answer:

45 cm ( in my opinion)‍♀️

Explanation:

( Using the mirror formula)

1/ u + 1/v = 1/f

( introducing magnification; m into the formula )

u( 1/u  + 1/v ) =u×1/f

1 + u/v =u/f

( But u/v =1 ÷v/u= 1/m)

1 +1/m =u/f

(Supposing m is actually equal to 2, and f =30 cm, then;)

1 + 1/2 =u/30

2+1= u/15

3=u/15

3×15=u

45 cm=u


Related Questions

Other Questions
Find the area of the shape What does area IVon the map indicate? Oregon Territory Mexican Cession Texas Annexation Louisiana PurchaseMissing Metadata The frame of the given window is madeof a rectangle with semi-circular top.Find its perimeter and area.2.1 m1.4 m What term must we add to complete the square on x^2 + 12x Deforestation is a major problem in the Amazon Rainforest. Which American state is about the size of the area of theAmazon that was cleared between 1990 and 2010?A. ArizonaB. MaineC. TexasD. MontanaPlease select the best answer from the choices provided PLZ HELP ME SOMEBODY...... WORD BANKWEATHER, WINDS , CONVECTION, DECREASES (2), LOW , TROPOPAUSEThe troposphere extends from Earths surface to an average of 12 km (7 miles). As you move upward, air pressure... . The temperature generally... with increasing height up to the tropopause. The... marks the transition into the stratosphere. increase with height up the jet stream. The interaction of solar energy and wind cause the upper layer of the troposphere to have a... moisture content. occurs in the troposphere due to the presence of water in the air as well as energy transfer from radiation and . Percentages less than 100% definition THE KOHLBERG DILEMMAS 2. Which of the following best describes the structure of the dilemmas? A. The dilemmas are written like mini episodes or short stories, designed to make the reader emotionally invested in the dilemmas. B. The dilemmas are composed of vague hypothetical situations followed by a series of equally vague questions, designed to make the reader think about larger, abstract concepts. C. The dilemmas are composed of specific hypothetical situations and then a series questions designed to provoke the reader into analyzing and intros pecting ones morals.D. The dilemmas are structured to imitate the stream-of-consciousness narrative, thus mimicking the thought process in decision-making. why is the international space station in orbit Find the volume of a pyramid with a square base, where the area of the base is8.7 m and the height of the pyramid is 10 m. Round your answer to the nearesttenth of a cubic meter. Jackson at the collectibles fair. He has exactly $8 and will purchase a collectible from a vendor for $5. What percent of his money will Jackson spend on the purchase? Find the quotient.1. 483=.2. In the expression, 96 divided by 8 = a , the quotient a =.3. Divide 12 lizards into 6 equal groups. How many lizards are in each group? There arelizards in each group. what is the y-intercept of the graph of the equation y=4x(3x) A; (0,4) B: (0,3) C;(0,12) D:(0,8) Which of these is found within all cells?Organ systemsOrgansTissuesMolecules how do you write 2x - 2y = 8 in slope-intercept form ? HELPP MEE FASTT I HAVE LESS THAN 10 MINFarrah borrowed $155 from her brother. She has already paid back $15. She plans to pay back $35 each month until the debt is paid off. Which describes the number of months it will take to pay off the debt? Select three options.x + 15 + 35 = 15535 x + 15 = 15535 x = 155 minus 15It will take 8 months to pay off the debt.It will take 4 months to pay off the debt. How are electrons similar and different to the planet Earth? PLS HELP!!!!!! In a survey of 4530 U.S. adults, 87% said that they would like to donate more to charity. What is the margin of error for the survey? Round to the nearest tenth of a percent Help plz. Easy 20 pointsThe Landlady you notice that it ends suddenly, leaving you wondering what happens next.Continue Dahls story by creating an alternative ending. Be creative and use the foreshadowing clues from the story. (Minimum of 2-3 well developed paragraphs of at least 7 sentences each.)The landlady by Ronald Dahl Plz help The crust below the oceans is _____.made of sand and salt sedimentmostly granitemade of metamorphic rock and granitebasalt and a layer of salt sediment