P - ↗️205. Which of the following causes refraction of light?
Anonymous Quiz
24%
❤️ a) Change in the density of light from one medium to another
28%
❤️ b) Change in viscosity of light from one medium to another
31%
❤️ c) Change in the speed of light from one medium to another
17%
❤️ d) Change in direction of light from one medium to another
P - 📱206. The magnification of ‘X’ is more than unity. Identify X.
Anonymous Quiz
29%
❤️ a) Convex mirror
45%
❤️ b) Concave mirror
15%
❤️ c) Plane mirror
11%
❤️ d) Prism
P - 💡207. What happens to the shining of diamond if it is dipped in a transparent oil?
Anonymous Quiz
28%
❤️ a) Reduces
27%
❤️ b) Increases
35%
❤️ c) Remains the same
9%
❤️ d) Becomes colorless
P - 🟢208. Calculate its focal length if the radii of curvature of a double convex lens are 10 cm, and 20 cm and its refractive index is 1.75.
Anonymous Quiz
23%
❤️ a) 50 cm
33%
❤️ b) 13 cm
38%
❤️ c) 8.9 cm
6%
❤️ d) 8 cm
P- 💻209. If the radius of curvature of each face of the biconcave lens, made of glass of refractive index 1.25 is 50 cm, then what is the focal length of the lens in air?
Anonymous Quiz
21%
❤️ a) 30 cm
47%
❤️ b) -100 cm
24%
❤️ c) 100 cm
7%
❤️ d) -30 cm
P - 🚀210. Which of the following causes dispersion?
Anonymous Quiz
32%
❤️ a) Refraction
29%
❤️ b) Reflection
29%
❤️ c) Total internal reflection
10%
❤️ d) Total internal dispersion
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