This quiz works best with JavaScript enabled. Home > Grammar > Academic Writing > Reflection – Quiz 14 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Reflection Quiz 14 (30 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. If the power of a lens is-2 D, what is its focal length? A) +50 cm. B) -50 cm. C) -100 cm. D) +100 cm. Show Answer Correct Answer: B) -50 cm. 2. In the following example, try to identify the number of times the velocity of ball changes: "A football player kicks a football to another player of his team who kicks the football towards the goal. The goalkeeper of the opposite team collects the football and kicks it towards a player of his own team." A) Three times. B) Four times. C) Five times. D) Six times. Show Answer Correct Answer: A) Three times. 3. A 10 mm long awl pin is placed vertically in front of a concave mirror. A 5 mm long image of the awl pin is formed at 30 cm in front of the mirror. The focal length of this mirror is: A) -30 cm. B) -20 cm. C) -40 cm. D) -60 cm. Show Answer Correct Answer: B) -20 cm. 4. There is light on the Earth even on a dark, cloudy day. This is because clouds are: A) Opaque. B) Transparent. C) Translucent. D) Luminous. Show Answer Correct Answer: C) Translucent. 5. How do you write the algebraic notation when the scale factor is 1/2? A) (x, y) goes to (2x, 2y). B) (x, y) goes to (1/2x, 1/2y). C) (x, y) goes to (-2x, -2y). D) (x, y) goes to (2x, 1/2y). Show Answer Correct Answer: B) (x, y) goes to (1/2x, 1/2y). 6. An object is kept 30cm away from the pole of a mirror. Its inverted image at the same position as that of object then it is A) A concave mirror of focal length 15 cm. B) A convex mirror of focal length 15 cm. C) A plane mirror. D) A concave mirror of focal length 30 cm. Show Answer Correct Answer: A) A concave mirror of focal length 15 cm. 7. A ray of light is incident on a plane mirror and the angle of incidence is 25 degrees. What is the angle of reflection? A) 0 degrees. B) 50 degrees. C) 90 degrees. D) 25 degrees. Show Answer Correct Answer: D) 25 degrees. 8. Reflection in the line x=0, which means A) Reflected in the x-axis. B) Reflected in the y-axis. C) Reflected about the point (0, 0). D) None of the above. Show Answer Correct Answer: B) Reflected in the y-axis. 9. Triangle ABC has vertices A(5, 2). Find the coordinates of ABC after a reflection over the x-axis. A) A'(5, -2). B) A'(-5, -2). C) A'(-5, -2). D) A'(5, 2). Show Answer Correct Answer: A) A'(5, -2). 10. If the angle of incidence is 40 degrees, what is the angle of reflection? A) 50 degrees. B) 60 degrees. C) 90 degrees. D) 40 degrees. Show Answer Correct Answer: D) 40 degrees. 11. The image of an object, which is placed one foot in front of a plane mirror, will be ..... A) Behind the mirror and reversed, left to right. B) Behind the mirror. C) In front of the mirror and reversed, left to right. D) In front of the mirror. Show Answer Correct Answer: A) Behind the mirror and reversed, left to right. 12. Translucent is? A) When light bounces off an object. B) Material that only allows a little light to pass through. C) Our main source of light. D) None of the above. Show Answer Correct Answer: B) Material that only allows a little light to pass through. 13. Reflections are always ..... A) Congruent. B) Bigger. C) Smaller. D) Rotated. Show Answer Correct Answer: A) Congruent. 14. Which of the following is natural sources of light? A) Fire. B) Sun. C) Stars. D) All of the above. Show Answer Correct Answer: D) All of the above. 15. Point B(-7, -12) is reflected over the x-axis. What are the coordinates of B'? A) (7, 12). B) (-7, 12). C) (7, -12). D) (-7, -12). Show Answer Correct Answer: B) (-7, 12). 16. A convex lens is A) Thicker throughout. B) Thinner throughout. C) Thinner in middle, thicker at edges. D) Thicker in the middle, thinner at edges. Show Answer Correct Answer: D) Thicker in the middle, thinner at edges. 17. A ship of mass 3 x $10^7$ $10^4$ A) 1.5m/s. B) 1.1m/s. C) 0.1m/s. D) 0.5m/s. Show Answer Correct Answer: C) 0.1m/s. 18. A small air bubble in a glass block when seen from above appears to be raised because of A) Refraction of light. B) Reflection of light. C) Reflection and refraction of light. D) None of the above. Show Answer Correct Answer: A) Refraction of light. 19. An object is placed at a distance of 0.25 min front of a plane mirror. The distance between the object and image will be: ..... A) 0.25 m. B) 1.0 m. C) 0.5 m. D) 0.125 m. Show Answer Correct Answer: C) 0.5 m. 20. Two plane mirrors are placed parallel and facing each other.A light ray incident on one of the plane mirror at an angle of 45$^\circ$ after reflection from it strikes the other mirror.What is the angle between the incident ray and final reflected ray A) 45$^\circ$. B) 60$^\circ$. C) 90$^\circ$. D) 75$^\circ$. Show Answer Correct Answer: C) 90$^\circ$. 21. A concave mirror of radius 30 cm is placed in water. It's focal length in air and water differ by A) 0. B) 15. C) 60. D) 30. Show Answer Correct Answer: A) 0. 22. Point R' (-2, 8) is the image of point R (-2, 2). Which of the following could be that transformation? A) A reflection across the y-axis. B) A dilation with a scale factor of 4. C) A translation of 6 units up. D) A translation of 6 units to the right. Show Answer Correct Answer: C) A translation of 6 units up. 23. Which of the following is a real-world application of reflection? A) Solar panels. B) Fiber optics. C) Magnifying glass. D) Spectacles. Show Answer Correct Answer: B) Fiber optics. 24. If your angle of incidence is 68 degrees, what is the angle of reflection going to be? A) 32 degrees. B) 68 degrees. C) 72 degrees. D) 90 degrees. Show Answer Correct Answer: B) 68 degrees. 25. Which types of objects do not allow light to pass through them? A) Translucent. B) Opaque. C) Transparent. D) Penumbra. Show Answer Correct Answer: B) Opaque. 26. White light is made up of: A) Red, yellow, and blue. B) No colors. C) All colors. D) Red, green, and blue. Show Answer Correct Answer: C) All colors. 27. O is the point of intersection of the diagonals AC and BD of a trapezium ABCD with AB || DC.Through O, a line segment PQ is drawn parallel to AB meeting AD in P and BC in Q, then OP= A) OP=OQ. B) OP=2OQ. C) OQ=2OP. D) OP=1/3OQ. Show Answer Correct Answer: A) OP=OQ. 28. When light reflects it ..... A) Absorbs. B) Bounces. C) Continues in a straight line. D) Bends. Show Answer Correct Answer: B) Bounces. 29. Which axis is the vertical (up-down) one? A) X-axis. B) Y-axis. C) All the above. D) None of the above. Show Answer Correct Answer: B) Y-axis. 30. B(-2, -4)Reflect over the line y = x A) (2, -4). B) (-4, 2). C) (-4, -2). D) (4, 2). Show Answer Correct Answer: C) (-4, -2). ← PreviousNext →Related QuizzesGrammar QuizzesReflection Quiz 1Reflection Quiz 2Reflection Quiz 3Reflection Quiz 4Reflection Quiz 5Reflection Quiz 6Reflection Quiz 7Reflection Quiz 8Reflection Quiz 9 🏠 Back to Homepage 📘 Download PDF Books 📕 Premium PDF Books