A ray of light passes through four transparent media with refractive indices μ₁, μ2, H3, and µ₁ as shown in the figure. The surfaces of all media are parallel. If the emergent ray CD is parallel to the incident ray AB, we must have

Question:

Options :

(a) µ1=µ2
(b) µ2=µ3
(c) µ3=µ4
(d) µ4=µ1

Answer :

(d) µ₄=µ₁

Answer Steps :

step 1

step 2

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If current in an electric bulb changes by 1%, then the power will change by (a) 1%(b) 2%1000 OF(c) 4% anda darse(d) =%2

Two bulbs X and Y having same voltage rating and of power 40 watt and 60 watt respectively are connected in series across a potential difference of 300 volt, then

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