This quiz works best with JavaScript enabled. Home > Class 7 > Class 7 Science Chapter 11 Light – Quiz 17 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 7 Science Chapter 11 Light Quiz 17 (25 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. What is phenomenon of bending of light when it goes from one medium to another A) Refraction. B) Reflection. C) Transfraction. D) Rectillinear Propagation of light. Show Answer Correct Answer: A) Refraction. 2. A ..... is an object that contains a lens. A) Clock. B) Ballpoint pen. C) Microwave. D) Microscope. Show Answer Correct Answer: D) Microscope. 3. Which form of energy travels faster than anything in the universe? A) Electrical energy. B) Sound energy. C) Heat energy. D) Light energy. Show Answer Correct Answer: D) Light energy. 4. A concave lens has focal length of 15 cm. At what distance should the object from the lens be placed so that it forms an image at 10 cm from the lens? Also, find the magnification. A) U = + 30 cmm =-0.33. B) U = + 20 cmm =-1.33. C) U =-20 cmm = + 1.33. D) U =-30 cmm = + 0.33. Show Answer Correct Answer: D) U =-30 cmm = + 0.33. 5. What can be made when light shines on an opaque object? A) Illuminate. B) A hole. C) A shadow. D) None of the above. Show Answer Correct Answer: C) A shadow. 6. When we stand in front of our dressing table, our left hand seems to be right and right seems to be left. This is called A) Mirage. B) Up-side down phenomenon. C) Left-right confusion. D) Lateral inversion. Show Answer Correct Answer: D) Lateral inversion. 7. The moon is non luminous body A) False. B) True. C) All the above. D) None of the above. Show Answer Correct Answer: B) True. 8. Incandescent lamps last longer than fluorescent lamps. A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: B) False. 9. The bending of light A) Refraction. B) Reflection. C) Absorption. D) Transparent. Show Answer Correct Answer: A) Refraction. 10. A material through which light does not pass A) Transparent. B) Translucent. C) Opaque. D) None of the above. Show Answer Correct Answer: C) Opaque. 11. How many colours can be seen in a visible spectrum? A) 1. B) 6. C) 7. D) 3. Show Answer Correct Answer: C) 7. 12. Front balged part of the eyeball is called A) PUPIL. B) CORNEA. C) RETINA. D) IRIS. Show Answer Correct Answer: B) CORNEA. 13. How is refraction different from reflection. A) Reflection is the bouncing of light off an object and refraction is the bending of light when it moves through one kind of matter to another. B) Reflections is the bending of light when it moves through one kind of matter to another and refraction is the bouncing of light off an object. C) All the above. D) None of the above. Show Answer Correct Answer: A) Reflection is the bouncing of light off an object and refraction is the bending of light when it moves through one kind of matter to another. 14. To bend light waves. A) Opaque. B) Refract. C) Reflect. D) Prism. Show Answer Correct Answer: B) Refract. 15. Which of the following statement(s) is(are) not true?i The speed of light in vacuum is 3 x 105 km/s. ii.The real image is always inverted. iii.Magnification of plane mirror is +1 or-1iv. Image formed by a concave lens is always diminished and real. A) (ii). B) (iii) and (iv). C) (ii) and (iv). D) (i), (iii) and (iv). Show Answer Correct Answer: B) (iii) and (iv). 16. THE SHADOW OF AN OPAQUE OBJECT IS ALWAYS ..... IRRESPECTIVE OF ITS COLOURS A) WHITE. B) GREEN. C) BLACK. D) RED. Show Answer Correct Answer: C) BLACK. 17. What is the correct order of the visible light spectrum? A) Red, yellow, green, orange, blue, violet and indigo. B) Indigo, blue, violet, orange, yellow, green and red. C) Violet, blue, indigo, green, yellow, orange and red. D) Red, orange, yellow, green, blue, indigo and violet. Show Answer Correct Answer: D) Red, orange, yellow, green, blue, indigo and violet. 18. What is occupies two-thirds of the volume of eye? A) Vitreous fluid. B) Aqueous humour. C) Suspensory ligaments. D) Ciliary muscles. Show Answer Correct Answer: A) Vitreous fluid. 19. 2 ) An object is placed 20 cm in front of a plane mirror. The mirror is moved 2 cm towards the object. The distance between the positions of the original and final images seen in the mirror is: A) 02 cm. B) 22 cm. C) 04 cm. D) 18 cm. Show Answer Correct Answer: C) 04 cm. 20. What happens to light after it hits a mirror? A) It goes through the mirror and bend. B) It goes straight through the mirror. C) It goes around the mirror. D) It bounces off the mirror. Show Answer Correct Answer: D) It bounces off the mirror. 21. Nishant obtained an inverted and diminished image on looking at A) Inner side of spoon. B) Outer side of spoon. C) Flat surface of plate. D) None of the above. Show Answer Correct Answer: A) Inner side of spoon. 22. When an object 40cm high is placed in front of a plane mirror at a distance of 100cm then the size of the image will be: A) 20cm. B) 40cm. C) 100cm. D) 10cm. Show Answer Correct Answer: B) 40cm. 23. The number of constituent colours of white light A) 6. B) 5. C) 7. D) 8. Show Answer Correct Answer: C) 7. 24. When a ray goes from an optically rarer medium to a denser medium, it ..... A) Continues to travel in a straight line. B) Bends away from the normal. C) Bends towards the normal. D) Reflects to the initial medium. Show Answer Correct Answer: C) Bends towards the normal. 25. What are the primary colors of the pigment? A) Cyan, yellow and magenta. B) Red, green and blue. C) Black and white. D) None of the above. Show Answer Correct Answer: A) Cyan, yellow and magenta. ← PreviousNext →Related QuizzesClass 7 Science Chapter 11 Light Quiz 1Class 7 Science Chapter 11 Light Quiz 2Class 7 Science Chapter 11 Light Quiz 3Class 7 Science Chapter 11 Light Quiz 4Class 7 Science Chapter 11 Light Quiz 5Class 7 Science Chapter 11 Light Quiz 6Class 7 Science Chapter 11 Light Quiz 7Class 7 Science Chapter 11 Light Quiz 8Class 7 Science Chapter 11 Light Quiz 9Class 7 Science Chapter 11 Light Quiz 10 🏠 Back to Homepage 📘 Download PDF Books 📕 Premium PDF Books