Chapter 16: Problem 2214
A ray of light is incident at an angle \(30^{\circ}\) on a mirror, The angle between normal and reflected ray is (A) \(15^{\circ}\) (B) \(30^{\circ}\) (C) \(45^{\circ}\) (D) \(60^{\circ}\)
Chapter 16: Problem 2214
A ray of light is incident at an angle \(30^{\circ}\) on a mirror, The angle between normal and reflected ray is (A) \(15^{\circ}\) (B) \(30^{\circ}\) (C) \(45^{\circ}\) (D) \(60^{\circ}\)
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Get started for freeThe wave length corresponding to photon is \(0.016 \AA\). Its K.E. \(\quad\) J. $\left(\mathrm{h}=6.66 \times 10^{-34} \mathrm{SI}, \mathrm{c}=3.0 \times 10^{8} \mathrm{~ms}^{-1}\right)$ (A) \(1.237 \times 10^{-13}\) (B) \(1.237 \times 10^{13}\) (C) \(12.37 \times 10^{-13}\) (D) \(12.37 \times 10^{+13}\)
Light of certain color contain 2000 waves in the length of \(1 \mathrm{~mm}\) in air. What will be the wavelength of this light in medium of refractive index \(1.25\) ? (A) \(1000 \AA\) (B) \(2000 \AA\) (C) \(3000 \AA\) (D) \(4000 \AA\)
A ray of light from denser medium strikes a rarer medium at angle of incidence i. The reflected and refracted rays make an angle of \(90^{\circ}\) with each other. The angle of reflection and refraction are r and \(\mathrm{r}^{\prime}\) respectively. The critical angle is (A) \(\sin ^{-1}(\tan i)\) (B) \(\tan ^{-1}(\tan \mathrm{r})\) (C) \(\tan ^{-1}(\sin i)\) (D) \(\sin ^{-1}(\tan \mathrm{r})\)
A ray of light passes through a prism having refractive index \((\mathrm{n}=\sqrt{2})\), Suffers minimum deviation If angle of incident is double the angle of refraction within prism then angle of prism is (A) \(30^{\circ}\) (B) \(60^{\circ}\) (C) \(90^{\circ}\) (D) \(180^{\circ}\)
One convex lens and one concave lens placed is contact with each other. If the ratio of their power is \((2 / 3)\) and focal length of the combination is $30 \mathrm{~cm}$, then individual focal lengths are (A) \(15 \mathrm{~cm}\) and \(-10 \mathrm{~cm}\) (B) \(-15 \mathrm{~cm}\) and \(10 \mathrm{~cm}\) (C) \(30 \mathrm{~cm}\) and \(-20 \mathrm{~cm}\) (D) \(-30 \mathrm{~cm}\) and \(-30 \mathrm{~cm}\)
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