A prism of refractive index n? and another prism of refractive index n? are stuck together (as shown in the figure). n? and n? depend on λ, the wavelength of light, according to the relation: n? = 1.2 + (10.8 × 10?¹?)/λ² and n? = 1.45 + (1.8 × 10?¹?)/λ² The wavelength for which rays incident at any angle on the interface BC pass through without bending at that interface will be _______ nm.
Light rays travel undeviated if the refractive index of the medium does not change for any value of angle of incidence. i.e. n? = n? 1.2 + 10.8×10? ¹? /λ² = 1.45 + 1.8×10? ¹? /λ² 9.0×10? ¹? /λ² = 0.25 λ² = 36×10? ¹? λ = 6×10? m = 600 nm
<p>Light rays travel undeviated if the refractive index of the medium does not change for any value of angle of incidence.<br>i.e. n? = n? <br>1.2 + 10.8×10? ¹? /λ² = 1.45 + 1.8×10? ¹? /λ²<br>9.0×10? ¹? /λ² = 0.25<br>λ² = 36×10? ¹? <br>λ = 6×10? m = 600 nm</p>
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