Geometrical Optics Quiz | JEE Main Physics

Geometrical Optics – JEE Main Quiz

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Q1. Image formed at 200 cm inside glass (μ = 1.5, R = 50 cm). Object distance (m)?
✔ Correct Answer: 4 m
Q2. Prism (A = 60°, μ = √2). Angle of incidence at minimum deviation?
✔ Correct Answer: 45°
Q3. Critical angle is 45°. Ratio of refractive indices:
1 : 2
1 : √2
2 : 1
√2 : 1
✔ Correct Answer: √2 : 1
Q4.The driver sitting inside a parked car is watching vehicles approaching from behind with the help of his side view mirror, which is a convex mirror with radius of curvature R = 2 m. Another car approaches him from behind with a uniform speed of 90 km/hr. When the car is at a distance of 24 m from him, the magnitude of the acceleration of the image of the car in the side view mirror is 'a'. The value of 100a is
✔ Correct Answer: 8
Q5. Two convex lenses (30 cm, 10 cm) separated by 10 cm. Power?
5 D
1 D
20 D
10 D
✔ Correct Answer: 10 D
Q6. Convex lens focal length in air = 24 cm. In water (μ = 1.33)?
96 cm
72 cm
24 cm
48 cm
✔ Correct Answer: 96 cm
Q7. Distance between object and 2× magnified real image is 45 cm. Focal length?
✔ Correct Answer: 10 cm
Q8. Plano-convex lens behaves as concave mirror of focal length 0.2 m. Radius?
0.15 m
0.10 m
0.25 m
✔ Correct Answer: 0.10 m
Q9. Concave–convex lens + liquid system focal length?
700/11 cm
600/11 cm
800/11 cm
500/11 cm
✔ Correct Answer: 600/11 cm
Q10. Distance between object and twice magnified image is 45 cm. Focal length?
✔ Correct Answer: 10 cm
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