CLASS 10 {Boardwallah}

MCQS OF LIGHT CHAPTER 1.The SI unit of power of a lens is: A) Metre B) Dioptre C) Watt D) Joule 2.Which mirror is used as a shaving mirror? A) Plane mirror B) Convex mirror C) Concave mirror D) None of these 3.The image formed by a plane mirror is: A) Real and inverted B) Virtual and erect C) Real and erect D) Virtual and inverted 4.A convex lens is also known as: A) Diverging lens B) Converging lens C) Cylindrical lens D) Plane lens 5.The bending of light when it passes from one medium to another is called: A) Reflection B) Refraction C) Dispersion D) Scattering 6.The focal length of a plane mirror is: A) Zero B) Infinity C) One metre D) Negative 7.The mirror formula is: 8.Which mirror is used as a rear-view mirror in vehicles? A) Plane mirror B) Concave mirror C) Convex mirror D) None of these 9.The image formed by a convex mirror is always: A) Real and inverted B) Virtual, erect and diminished C) Real and magnified D) Virtual and magnified 10.The refractive index of air is approximately: A) 1 B) 1.33 C) 1.5 D) 2 11.The power of a lens is measured in: A) Watt B) Metre C) Dioptre D) Newton 12.A concave lens always forms an image that is: A) Real and inverted B) Virtual, erect and diminished C) Real and magnified D) Virtual and magnified 13.According to the law of reflection: A) Angle of incidence = Angle of reflection B) Angle of incidence > Angle of reflection C) Angle of reflection = 90° D) None of these 14.Which lens is thicker at the centre than at the edges? A) Concave lens B) Convex lens C) Cylindrical lens D) Plane lens 15.The image formed by a convex lens when the object is beyond 2F is: A) Real, inverted and diminished B) Virtual and erect C) Real and magnified D) Virtual and magnified 16.The power of a concave lens is: A) Positive B) Negative C) Zero D) Infinite 17.The principal focus of a concave mirror is: A) Behind the mirror B) At infinity C) In front of the mirror D) At the pole 18.The speed of light is maximum in: A) Water B) Glass C) Air D) Vacuum 19.A ray passing through the optical centre of a convex lens: A) Bends towards the principal axis B) Retraces its path C) Passes undeviated D) Reflects back 20.The mirror used in solar cookers is: A) Plane mirror B) Convex mirror C) Concave mirror D) Cylindrical mirror

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⚠️ IMPORTANT ⚠️ Best Books to start your preparation for new session 2026-27 !! Read these books and do all questions 😉 you can get 90-95% easily ( but do these books completely) Based on new 2026-27 syllabus Class 9th -https://bit.ly/3V3QRYC Class 10th- https://bit.ly/3ViMnib Class 11th - https://bit.ly/3yBCT90 Class 12th - https://bit.ly/3VjU5c0 Jee + Neet -  https://bit.ly/4e2UgQb Download and save these PDFs before deleting !! It may get deleted anytime 🥺🥹 This year many questions were directly from this book only so download it fast for next session

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🔥Nationalism in India – Timeline🔥 @iitianpatrika 1915  -- Mahatma Gandhi returned to India. 1916 --Gandhiji travelled to Champaran to inspire peasants against the oppressive plantation system. 1917 --- Gandhiji organised Satyagraha in Kheda district of Gujarat. 1918 --- Gandhiji went to Ahmedabad to organise Satyagraha among cotton mill workers. 1918-19 ---Distressed Uttar Pradesh peasants organised by Baba Ramchandra 1919 --Khilafat Committee was formed in Bombay. 1919 --- Hartal against Rowlatt Act; 1919----Jallianwalla Bagh Massacre 1920---Gandhiji convinced other leaders of the need to start a Non-Cooperation Movement in support of Khilafat as well as for Swaraj in                       Calcutta Congress Session. 1921-- Non-Cooperation and Khilafat Movement launched. 1922 ---Incident of Chauri Chaura; Gandhiji withdrew Non-Cooperation Movement. 1924 ---Alluri Sitaram Raju arrested ending a two years armed tribal struggle. 1927---Federation of the Indian Chamber of Commerce and Industries (FICCI) was formed. 1928-- The Simon Commission arrived in India. 1928 --- The Hindustan Socialist Republic Army (HSRA) was founded. 1929 --- Lord Irwin announced a vague offer of ‘dominion status’ for India. 1929 ---Lahore Congress; Congress adopted the demand for ‘Puma Swaraj’. 1930---- Dr BR Ambedkar established Depressed Classes Association. 1930 ---- Gandhiji begins Civil Disobedience Movement by breaking Salt Law at Dandi. 1931---- Gandhiji ends Civil-Disobedience Movement; Gandhi-lrwin Pact; Second Round Table Conference. 1932---Poona pact signed between Dr Babasaheb Ambedkar and Mahatma Gandhi; Civil Disobedience Movement relaunched. ♥For more important  short notes and regular chapter quizes join this channel students👍👍👍. @iitianpatrika

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