Class 10 Practice – Level 1 – Light – Reflection and Refraction Leave a Comment / By Gulam Hamza / August 2, 2024 Class 10 Practice - Level 1 - Light - Reflection and Refraction Total questions: 40 1. What is the angle of incidence if a ray of light strikes a plane mirror at an angle of 30° to the normal? Topic: Reflection of Light 30° 60° 90° 45° None 2. The image formed by a plane mirror is: Topic: Reflection of Light Real and inverted Real and erect Virtual and inverted Virtual and erect None 3. When light reflects off a surface, the angle of incidence is equal to the: Topic: Reflection of Light Angle of refraction Angle of reflection Angle of deviation Angle of emergence None 4. A ray of light passing through the center of curvature of a concave mirror: Topic: Reflection of Light Passes through the principal focus Retraces its path Is reflected parallel to the principal axis None of the above None 5. The focal length of a plane mirror is: Topic: Reflection of Light Infinity Zero Equal to the radius of curvature Cannot be determined None 6. The bending of light when it passes from one medium to another is called: Topic: Refraction of Light Reflection Refraction Dispersion Scattering None 7. A light ray traveling from air into glass will: Topic: Refraction of Light Speed up and bend away from the normal Speed up and bend towards the normal Slow down and bend away from the normal Slow down and bend towards the normal None 8. The refractive index of a medium is defined as: Topic: Refraction of Light The ratio of the speed of light in a vacuum to the speed of light in the medium The ratio of the speed of light in the medium to the speed of light in a vacuum The angle of incidence to the angle of refraction The angle of refraction to the angle of incidence None 9. Which of the following has the highest refractive index? Topic: Refraction of Light Water Air Diamond Glass None 10. When a ray of light passes from water to air, it: Topic: Refraction of Light Bends towards the normal Bends away from the normal Passes undeviated Is reflected back into the water None 11. The point on the principal axis where parallel rays of light converge after reflection from a concave mirror is called: Topic: Spherical Mirrors Center of curvature Principal focus Pole Radius of curvature None 12. The distance between the pole and the principal focus of a concave mirror is called: Topic: Spherical Mirrors Radius of curvature Focal length Diameter Magnification None 13. If the focal length of a convex mirror is 10 cm, its radius of curvature is: Topic: Spherical Mirrors 5 cm 10 cm 20 cm 30 cm None 14. Which type of mirror is used in vehicle rearview mirrors? Topic: Spherical Mirrors Plane mirror Concave mirror Convex mirror Parabolic mirror None 15. The image formed by a convex mirror is always: Topic: Spherical Mirrors Real and inverted Virtual and erect Real and erect Virtual and inverted None 16. A convex lens is also known as: Topic: Refraction by Lenses Converging lens Diverging lens Planar lens Cylindrical lens None 17. A concave lens is also known as: Topic: Refraction by Lenses Converging lens Diverging lens Planar lens Cylindrical lens None 18. The image formed by a concave lens is always: Topic: Refraction by Lenses Real and inverted Virtual and erect Real and erect Virtual and inverted None 19. If the focal length of a concave lens is -15 cm, its power is: Topic: Refraction by Lenses +15 diopters -15 diopters +6.67 diopters -6.67 diopters None 20. The unit of power of a lens is: Topic: Refraction by Lenses Meter Centimeter Diopter Watt None 21. The part of the eye that controls the amount of light entering it is: Topic: Human Eye Cornea Lens Retina Iris None 22. The image formed on the retina of the human eye is: Topic: Human Eye Real and erect Virtual and erect Virtual and inverted Real and inverted None 23. Which part of the human eye provides most of the refraction of light entering the eye? Topic: Human Eye Cornea Lens Retina Pupil None 24. The defect of vision in which a person cannot see distant objects clearly is called: Topic: Human Eye Myopia Hypermetropia Presbyopia stigmatism None 25. The focal length of the eye lens increases when the eye muscles: Topic: Human Eye Contract Relax Remain unchanged None of the above None 26. Which of the following is used to correct hypermetropia? Topic: Human Eye Concave lens Convex lens Cylindrical lens None of the above None 27. The least distance of distinct vision for a normal human eye is: Topic: Human Eye 10 cm 25 cm 50 cm 100 cm None 28. The power of accommodation of the eye refers to: Topic: Human Eye The ability to see in dim light The ability to see in bright light The ability to adjust the focal length of the lens The ability to distinguish colours None 29. Which optical instrument uses a concave mirror to form images? Topic: Optical Instruments Microscope Telescope Camera Magnifying glass None 30. The magnification produced by a convex lens is: Topic: Optical Instruments Always less than 1 Always more than 1 Always equal to 1 Can be less than, more than, or equal to 1 None 31. Which part of the microscope is responsible for focusing light on the specimen? Topic: Optical Instruments Eyepiece Objective lens Condenser Stage None 32. The primary function of the eyepiece in a microscope is to: Topic: Optical Instruments Magnify the image formed by the objective lens Collect light from the specimen Reflect light onto the specimen Control the intensity of light None 33. In a simple microscope, the final image is: Topic: Optical Instruments Real and inverted Real and erect Virtual and inverted Virtual and erect None 34. Which of the following lenses would you use to make a simple microscope? Topic: Optical Instruments Concave lens Convex lens Cylindrical lens Bifocal lens None 35. The primary function of a camera lens is to: Topic: Optical Instruments Magnify objects Capture and focus light to form an image Reflect light Disperse light None 36. The splitting of white light into its constituent colours is called: Topic: Dispersion and Scattering Reflection Refraction Dispersion Scattering None 37. The colour of the sky appears blue due to: Topic: Dispersion and Scattering Dispersion of light Scattering of light Reflection of light Refraction of light None 38. Which colour of light is least scattered by the atmosphere? Topic: Dispersion and Scattering Blue Green Red Yellow None 39. The phenomenon responsible for the twinkling of stars is: Topic: Dispersion and Scattering Reflection Refraction Dispersion Scattering None 40. The rainbow is formed due to: Topic: Dispersion and Scattering Reflection and scattering Refraction and dispersion Dispersion and reflection Scattering and refraction None 1 out of 40 Time's up
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