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Refraction of wave
Quiz by ภัทรา ภักดีเกียรติ
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เมื่อคลื่นเกิดการหักเหจากการผ่านตัวกลางต่างชนิดกัน ปริมาณใดไม่เปลี่ยนแปลง
ความยาวคลื่น
ความเร็ว
ถูกทุกข้อ
ความถี่
การหักเหของคลื่นเกิดขึ้นเมื่อใด
1. คลื่นเคลื่อนที่ผ่านตัวกลางผ่านชนิดเดียวกัน
2. เมื่อความเร็วคลื่นเปลี่ยนไป
3. เมื่อความยาวคลื่นเปลี่ยนไป
4. เมื่อความถี่คลื่นเปลี่ยนไป
ข้อ 2,4
ข้อ 2,3
ข้อ 1,3 และ 4
ข้อ 1,2 และ 3
เมื่อคลื่นเกิดการหักเหจากการผ่านตัวกลางต่างชนิดกัน ปริมาณใดไม่เปลี่ยนแปลง
การหักเหของคลื่นเกิดขึ้นเมื่อใด
1. คลื่นเคลื่อนที่ผ่านตัวกลางผ่านชนิดเดียวกัน
2. เมื่อความเร็วคลื่นเปลี่ยนไป
3. เมื่อความยาวคลื่นเปลี่ยนไป
4. เมื่อความถี่คลื่นเปลี่ยนไป
คลื่นน้ำขบวนหนึ่งเคลื่อนที่จากA ไป B มีมุมตกกระทบ 37 และมีมุมหักเห 53 จงหาอัตราส่วนระหว่างความยาวคลื่นในตัวกลาง A ต่อ B
เมื่อคลื่นน้ำเคลื่อนที่จากบริเวณน้ำลึกเข้าสู่บริเวณน้ำตื้น โดยมีหน้าคลื่นขนานกับรอยต่อของน้ำลึกและน้ำตื้นข้อใดกล่าวถูกต้อง
คลื่นน้ำเคลื่อนที่จากบริเวณน้ำตื้นไปน้ำลึก ทำมุมตกกระทบ 30องศา และมีมุมหักเห 53 องศา ถ้าควายาวคลื่นในน้ำตื้นวัดได้ 5 cm ในน้ำลึกจะมีความยาวคลื่นกี่เซนติเมตร
ข้อใดต่อไปนี้กล่าวผิด
ข้อความใดถูกต้องเกี่ยวกับคลื่นน้ำ
ในการทดลองเรื่องการหักเหของคลื่นผิวน้ำเมื่อคลื่นผิวน้ำเคลื่อนที่จากบริเวณน้ำตื้นไปน้ำลึก ความยาวคลื่น ความเร็วและความถี่ ของคลื่นผิวน้ำมีการเปลี่ยนแปลงอย่างไร
Refraction of Waves - Starter Quiz7.2.1 Critical Angle 1. The critical angle is the angle of incidence at which the refracted ray: A. Bends toward the normal B. Bends away from the normal C. Travels along the boundary D. Is totally reflected Answer: C 7.2.2 Snell’s Law & Critical Angle 2. Which formula correctly represents the critical angle c when light travels from medium 1 to medium 2? A. n1cosc=n2 B. n2sinc=n1 C. n1sinc=n2 D. n1sinc=n2sin90∘ Answer: D 7.2.3 Total Internal Reflection 3. Total internal reflection occurs only when: A. Light travels from air to glass B. Angle of incidence is less than the critical angle C. Light travels from a denser to a rarer medium D. Refractive index of the second medium is greater Answer: C 4. Which condition is not required for total internal reflection? A. Light must travel from a denser medium B. Angle of incidence must exceed the critical angle C. Refractive index of second medium must be lower D. Light must strike at 90° Answer: D 7.2.4 Ray Diagrams & Angle Calculations 5. A ray in water (n = 1.33) hits the surface at 40°. Critical angle = 48.8°. What happens? A. Refraction only B. Total internal reflection C. No refraction D. Light stops Answer: A 7.2.5 Snell’s Law in Glass Blocks & Prisms 6. A ray enters glass (n = 1.5) from air at 30°. Which statement is correct? A. It bends away from the normal B. It bends toward the normal C. It travels straight D. It undergoes total internal reflection Answer: B 7. In a prism, the deviation of light occurs mainly because: A. Light slows down in glass B. Light speeds up in glass C. Light reflects internally D. Light cannot pass through glass Answer: A 7.2.6 Mirages 8. A mirage appears on a hot road because: A. Light reflects off the sky B. Light refracts through layers of air with different densities C. Light undergoes dispersion D. Light travels in straight lines only Answer: B 7.2.7 Dispersion Through a Prism 9. Dispersion occurs because: A. All colors refract equally B. Different wavelengths refract differently C. The prism reflects light D. White light cannot be refracted Answer: B 7.2.8 Rainbow Formation 10. A rainbow is formed due to: A. Refraction only B. Total internal reflection only C. Dispersion only D. Refraction + TIR + dispersion Answer: D 7.2.9 Optical Fibers 11. Optical fibers work mainly due to: A. Refraction B. Diffraction C. Total internal reflection D. Dispersion Answer: C 12. Which is an advantage of optical fibers? A. High signal loss B. Immune to electromagnetic interference C. Very heavy D. Slow data transmission Answer: BBehavior of Light Waves Reflection - Starter QuizVocabulary List 1. Avocation Definition: A hobby or activity someone enjoys doing in addition to their main work. Example: Drawing cartoons was his favorite avocation after school. 2. Supercolossal Definition: Extremely large; even bigger than enormous. Example: They ordered a supercolossal pizza to share. 3. Repress Definition: To hold back or keep feelings or thoughts hidden. Example: She tried to repress her anger during the argument. 4. Subliminally Definition: In a way that affects the mind without someone realizing it. Example: The music subliminally made the store feel calmer. 5. Thrombosis Definition: A medical condition where a blood clot forms inside a blood vessel. Example: The doctor warned that lack of exercise can increase the risk of thrombosis. 6. Sclerosis Definition: A hardening of body tissue, especially arteries or organs. Example: The patient was diagnosed with sclerosis that affected his mobility. 7. Distortion Definition: A change that makes something appear different from what it really is. Example: The funhouse mirror caused a distortion of her reflection. 8. Philanthropy Definition: The act of giving money or help to improve the lives of others. Example: His philanthropy helped build a new library for the town. 9. Prevarications Definition: Lies or evasive statements used to avoid telling the truth. Example: The teacher grew tired of the student’s prevarications about missing homework. 10. Syndrome Definition: A group of symptoms or behaviors that occur together. Example: The doctor studied the syndrome to better understand the illness. 11. Schizophrenic Definition: Relating to a mental disorder where a person may have difficulty distinguishing reality from imagination. Example: The character in the story showed schizophrenic behavior. 12. Subsidize Definition: To support financially, usually with money from the government or an organization. Example: The city decided to subsidize public transportation. 13. Phenomenal Definition: Very remarkable or impressive. Example: The athlete gave a phenomenal performance in the race. 14. Demented Definition: Showing disturbed or irrational behavior. Example: The villain in the movie had a demented laugh. 15. Patron Definition: A person who supports or regularly visits a business, artist, or organization. Example: She was a loyal patron of the local bookstore. 16. Cultural Lag Definition: When ideas and beliefs take longer to change than technology or society. Example: Cultural lag can make it hard for laws to keep up with new technology. 17. Omens Definition: Signs believed to predict something that will happen in the future. Example: Some people think black cats are omens of bad luck. 18. Antagonistic Definition: Showing hostility or opposition. Example: The rival teams were antagonistic toward each other. 19. Voluptuous Definition: Curvy and attractive in a full, rich way. Example: The sculpture showed a voluptuous figure. 20. Oscilloscope Definition: A device used to view and measure electrical signals. Example: The scientist used an oscilloscope to study the sound waves. 21. Putrid Definition: Rotting and giving off a very bad smell. Example: The garbage smelled putrid after sitting in the sun. 22. Fixated Definition: Focused or obsessed with something. Example: He became fixated on winning the competition. 23. Mundane Definition: Ordinary, dull, or routine. Example: She was tired of the mundane chores she had to do every day. 24. Ghouls Definition: Evil or ghost-like creatures that feed on the dead in stories or legends. Example: The haunted house story was filled with ghouls and monsters. 25. Maladjusted Definition: Unable to cope well with the demands of life or society. Example: The counselor helped the maladjusted student deal with stress. 26. Incongruous Definition: Not fitting in; out of place. Example: The fancy chandelier looked incongruous in the small cabin. 27. Tribute Definition: Something done or given to show respect or admiration. Example: The concert was a tribute to the famous musician. 28. Audibly Definition: In a way that can be heard clearly. Example: He audibly sighed when the test ended. 29. Proficiency Definition: Skill or competence in doing something. Example: Her proficiency in math helped her tutor other students.Refraction of light through plane surfaceRefraction of lightREFRACTION OF LIGHT AT PLANE SURFACESReflection and Refraction of Light