ω1=0.02;μ1=1.5;ω2=0.03;μ2=1.6
Achromatic combination
∴θnet=0
θ1−θ2=0
θ1=θ2
ω1δ1=ω2δ2
and δnet=δ1−δ2=2∘
δ1−ω2ω1δ1=2∘
δ1(1−ω2ω1)=2∘
δ1(1−32)=2∘
δ1=6∘
δ1=(μ1−1)A1
6∘=(1.5−1)A1
A1=12∘
A deviation of 2∘ is produced in the yellow ray when prism of crown and flint glass are achromatically combined. Taking dispersive powers of crown and flint glass are 0.02 and 0.03 respectively and refractive index for yellow light for these glasses are 1.5 and 1.6 respectively. The refracting angles for crown glass prism will be ________∘ (in degree)
(Round off to the Nearest Integer)
Held on 16 Mar 2021 · Verified 6 Jul 2026.
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