HSC Science (Computer Science) 12th Board ExamMaharashtra State Board
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# In a Biprism Experiment, When a Convex Lens Was Placed Between the Biprism and Eyepiece at a Distance of 30 Cm from the Slit, the Virtual Images of the Slits Are Found to Be Separated by 7 Mm. - HSC Science (Computer Science) 12th Board Exam - Physics

ConceptMeasurement of Wavelength by Biprism Experiment

#### Question

In a biprism experiment, when a convex lens was placed between the biprism and eyepiece at a distance of 30 cm from the slit, the virtual images of the slits are found to be separated by 7 mm. If the distance between the slit and biprism is 10 cm and between the biprism and eyepiece is 80cm, find the linear magnification of the image.

#### Solution

Given: D = 10 + 80 = 90 cm,

d = 30 cm, d1 = 60 cm

To find: Linear magnification (m)

Formula: m=d_1/d="v"/u

Calculation: From formula,

"v"/u=60/30

∴ m=2

The linear magnification of the image is 2.

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#### APPEARS IN

2014-2015 (October) (with solutions)
Question 7.8 | 2.00 marks
Solution In a Biprism Experiment, When a Convex Lens Was Placed Between the Biprism and Eyepiece at a Distance of 30 Cm from the Slit, the Virtual Images of the Slits Are Found to Be Separated by 7 Mm. Concept: Measurement of Wavelength by Biprism Experiment.
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