Gce Model Questions Vol1 2020 Physics Question 50

Practice objective / multiple choice question 50 from the 2020 Gce Model Questions Vol1 Physics examination.

Gce Model Questions Vol1 2020 Physics Objective / Multiple Choice Hard Difficulty

Question 50 GCE_MODEL_QUESTIONS_VOL1 • 2020 • PHYSICS • objective

In a double‑slit experiment the slit separation is \(d=0.30\ \text{mm}\) and monochromatic light of wavelength \(\lambda=600\ \text{nm}\) in air is used. A thin glass plate of refractive index \(n=1.50\) is introduced in front of one slit, causing the central maximum on the distant screen to shift by three bright fringes. (i) Determine the thickness \(t\) of the glass plate. (ii) If the plate of the same thickness \(t\) is replaced by a material of unknown refractive index \(n'\), and the shift observed is now two bright fringes, find \(n'\).

Answer Options

Correct Answer A. t=3.6\ \mu\text{m},\ n'=1.33

B. t=2.4\ \mu\text{m},\ n'=1.33

C. t=3.6\ \mu\text{m},\ n'=1.25

D. t=4.5\ \mu\text{m},\ n'=1.25

Correct Answer

Correct Option:

t=3.6\ \mu\text{m},\ n'=1.33

About This Question

This is Gce Model Questions Vol1 2020 Physics Question 50. It is one of the objective questions from the 2020 Gce Model Questions Vol1 Physics examination.

Difficulty level: Hard .

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