Advertisements
Advertisements
Question
The photograph of a house occupies an area of 1.75 cm2on a 35 mm slide. The slide is projected on to a screen, and the area of the house on the screen is 1.55 m2. What is the linear magnification of the projector-screen arrangement?
Advertisements
Solution
Area of the house on the slide = 1.75 cm2
Area of the image of the house formed on the screen = 1.55 × 104 cm2
Arial magnification, ma =` "Area of image"/"Area of object" = (1.55 xx 10^4)/1.75 `
= 8857.14
∴ Linear magnifications, `m_l = sqrtm_a`
=`sqrt(8857.14)` = 94.11
APPEARS IN
RELATED QUESTIONS
How many significant figures are present in the 0.0025?
How many significant figures are present in the 126,000?
How many significant figures are present in the 2.0034?
Round up the following upto three significant figures:
2808
The relative density of lead is 11.3. Its density is ______ g cm–3or ______ kg m–3.
You are given a thread and a metre scale. How will you estimate the diameter of the thread?
A LASER is a source of very intense, monochromatic, and unidirectional beam of light. These properties of a laser light can be exploited to measure long distances. The distance of the Moon from the Earth has been already determined very precisely using a laser as a source of light. A laser light beamed at the Moon takes 2.56 s to return after reflection at the Moon’s surface. How much is the radius of the lunar orbit around the Earth?
State the number of significant figures in the following:
0.2370 g cm–3
Solve the numerical example.
Nuclear radius R has a dependence on the mass number (A) as R =1.3 × 10-16 A1/3 m. For a nucleus of mass number A = 125, obtain the order of magnitude of R expressed in the meter.
Which of the following has the highest number of significant figures?
How many significant figures should be present in the answer of the following calculations?
`(2.5 xx 1.25 xx 3.5)/2.01`
The numbers 2.745 and 2.735 on rounding off to 3 significant figures will give ______.
Why do we have different units for the same physical quantity?
How many significant figures are present in the measurement 2007 grams?
How many significant figures are there in the number 0.001405?
The radius of Earth is expressed as 0.64 × 10⁷ m in scientific notation. What is its order of magnitude and number of significant figures?
Which of the following statements is correct about significant figures and accuracy?
