Class 10 Physics Chapter 3 Question Answer

Important Class 10 Physics Chapter 3 Question Answer written by Honorable Mr. Qamar Jamal Suib. These computerized notes are very helpful in the preparation of Sound for students of the 10th class Physics and these are according to the paper patterns of all Punjab boards.

• Here are the detailed Class 10 Physics Chapter 3 Question Answer to help you prepare for your exams.
• Important Multiple Choice Questions ( MCQs ) with correct Answers of Chapter No. 12: Geometrical Optics in Physics class 10th Urdu Medium.
• Important Short Questions with Correct Answers of Chapter No. 12: Geometrical Optics in Physics class 10th Urdu Medium.
• The disability of the eye to form distinct images of distant objects on its retina is known as nearsightedness. The nearsighted eye can be corrected with glass or contact lenses that use diverging lenses Light rays from the distant objects will diverge by this lens before entering the eye.
• The disability of the eye to form distinct images of nearby objects on its retina is known as farsightedness. This defects can be corrected with the aid of a suitable converging lens. The lens refracts the light rays more towards the principal axis before they enter the eye.
• Which of the following quantity is not changed during refraction of light?  (a) its direction (b) its speed (c) its frequency (d) its wavelength
• A converging mirror with a radius of 20 cm creates a real image 30 cm from the mirror. What is the object distance?  (a) -5.0 (b) -7.5 cm (c) -15 cm (d) -20 cm
• An object is placed at the centre of curvature of a concave mirror. The image produced by the mirror is located  (a) out beyond the centre of curvature. (b) at the centre of curvature. (c) between the centre of curvature and the focal point (d) at the focal point
• An object is 14 cm in front of a convex mirror. The image is 5.8 cm behind the mirror. What is the focal length of the mirror?  (a) -4.1 cm (b) -9.9 cm (c) -8.2 cm (d) -20 cm
• The index of refraction depends on  (a) the focal length (b) the speed of light (c) upright and real real, erect, same size (d) the object distance
• Which type of image is formed by a concave lens on a screen?  (a) the focal length (b) inverted and virtual (c) upright and real real (d) upright and virtual
• Which type of image is produced by the converging lens of human eye if it views a distant object?  (a) real, inverted, diminished (b) inverted and virtual (c) virtual, erect, diminished  (d) virtual, inverted, magnified
• Image formed by a camera is  (a) real, inverted, and diminished (b) virtual, upright and diminished (c) virtual, upright and magnified  (d) real, inverted and magnified
• If a ray of light in glass is incident on an air surface at an angle greater than the critical angle, the ray will  (a) refract only (b) reflect only (c) partially refract and partially reflect  (d) diffract only
• The critical angle for a beam of light passing from water into air is 48.8 degrees. This means that all light rays with an angle of incidence greater than this angle will be  (a) absorbed (b) totally reflected (c) partially reflected and partially transmitted  (d) totally transmitted
• Light is the main focus of this unit. We shall describe different phenomena of light such as reflection, refraction and total internal reflection. We will learn how images are formed by mirrors and lenses and will discuss working principle of compound microscope and telescope.
• If you're looking for comprehensive 10th class physics chapter 3 question answer, you've come to the right place.
• REFLECTION OF LIGHT:
• Reflection of light Now we can define the phenomenon of reflection as:
• "When light travelling in a certain medium falls on the surface of another medium, a part of it turns back in the same medium".
• Laws of Reflection:
• The incident ray, the normal, and the reflected ray at the point of incidence all lie in the same plane.
• The angle of incidence is equal to the angle of reflection i.e., i = r.