Share Facebook Email Telegram WhatsApp Results #1. The centre of the reflecting surface of a sperical mirror is called the _______. Pole Pole Radius Radius Centre of curvature Centre of curvature Focus Focus #2. When light waves pass from air to glass the variable affected are ________. Wavelength, frequency and velocity Wavelength, frequency and velocity Velocity and frequency Velocity and frequency Wavelength and frequency Wavelength and frequency Wavelength and Velocity Wavelength and Velocity #3. Which of the following statement is true ? The light has a greater velocity The light has a greater velocity The sound has the greatest velocity The sound has the greatest velocity Celestial objects have the greatest velocity Celestial objects have the greatest velocity Rocket has the greatest velocity Rocket has the greatest velocity #4. What will be the size of image formed by a concave mirror when an object placed between pole and focus ? Same size Same size Enlarged Enlarged Point size Point size Diminished Diminished #5. The magnifying glass is ________. Convex lens Convex lens Convex mirror Convex mirror Concave lens Concave lens Concave mirror Concave mirror #6. For normal eyes what is the minimum distance for clear vision? 10 cm 10 cm 15 cm 15 cm 20 cm 20 cm 25 cm 25 cm #7. The correct relation between the radius of curvature R and focal length f of a spherical mirror is ______. R = f R = f R = 2f R = 2f R = 3f R = 3f R = 4f R = 4f #8. Rainbow is seen after rain because of hanging molecules of water which act as __________. Lenses Lenses Prism Prism Mirrors Mirrors Mirrors Mirrors #9. What is the distance between the focal point or focus point in the lens and the vision center or optical center? Radius of curvature Radius of curvature Principal line Principal line Focal length Focal length Focus Focus #10. In a concave mirror when the object is placed at infinity which of the following applies to the image ? Real, inverted image of the same size at centre of curvature Real, inverted image of the same size at centre of curvature Real, inverted, highly diminished image at focus Real, inverted, highly diminished image at focus Real, inverted highly enlarged image at centre of curvature Real, inverted highly enlarged image at centre of curvature Real, inverted, diminished image between centre of curvature (c) and principal focus (F) Real, inverted, diminished image between centre of curvature (c) and principal focus (F) Finish
