Share Facebook Email Telegram WhatsApp Results #1. Which one of the following statements regarding lenses is not correct ? A convex lens produces both real and virtual images A convex lens produces both real and virtual images A concave lens produces both real and virtual images A concave lens produces both real and virtual images A convex lens can produce images equal, greater and smaller than the size of the object A convex lens can produce images equal, greater and smaller than the size of the object A concave lens always produces images smaller than the size of the object A concave lens always produces images smaller than the size of the object #2. Lenses with two focal lengths are used by persons suffering from _________. Myopia and hypermetropia Myopia and hypermetropia Myopia or hypermetropia Myopia or hypermetropia Myopia but not hypermetropia Myopia but not hypermetropia Hypermetropia but not myopia Hypermetropia but not myopia #3. Which combination of colour is the most convenient during day and night time ? Orange and blue Orange and blue White and black White and black Yellow and blue Yellow and blue Red and green Red and green #4. The Quantum Theory of light was given by _______. Einstein Einstein Planck Planck Newton Newton Faraday Faraday #5. The phenomenon of deviation of light rays from their original path, when they pass from one medium to another, is called ________. Reflection Reflection Refraction Refraction Obstruction Obstruction Diffraction Diffraction #6. If the Focal length of a mirror is +15, It is _________. Plane mirror Plane mirror Concave mirror Concave mirror Convex mirror Convex mirror Double lens Double lens #7. Which one of the following lenses should be used to correct the defect of astigmatism? Cylindrical lens Cylindrical lens Concave lens Concave lens Convex lens Convex lens Bifocal lens Bifocal lens #8. The ratio of the speed of light in a medium to a vacuum is called________. Reflective index Reflective index Refractive index Refractive index Medivec Index Medivec Index Air Quality Index Air Quality Index #9. Which one of the colours has the longest wavelength? Green Green Yellow Yellow Blue Blue Red Red #10. An air bubble in water will act like a _______. Convex mirror Convex mirror Convex lens Convex lens Concave mirror Concave mirror Concave lens Concave lens Finish
