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For the same angle of incidence, the ang...

For the same angle of incidence, the angle of refraction in two media A and B are `25^@` and ` 35^@` respectively. In which one of the two media is the speed of light lesser?

Text Solution

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Formula : `mu = (sin i)/(sin r) = v_1/v_2`
` (mu_A)/(mu_B) = ((sin i)/(sin r_A))/((sin i)/(sin r_B)) = (sin B)/(sin r_A) = ((v_1)/(v_A))/((v_1)/(v_B))`
` (sin r_B)/(sin r_A) = (v_B)/(v_A)`
` r_A lt r_B sin r_A lt sin r_B rArr v_A lt v_B`
speed of light in A is lesser .
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