Assalam_o_Alaikum!
I am ZahraAwan.
This lecture is specially recorded for students of #10th_class, 10th class from all #Punjab_Boards and is based on the current curriculum of study for (#ptb) Physics book.
All these lectures are conducted in Urdu/English medium to facilitate Pakistani students.
After watching this video . You will be able to answer the following questions :
12.1 : What do you understand by reflection of light? Draw a diagram to illustrate reflection at a plane surface. 00:00:30
12.2 : Describe the following terms used in reflection: 00:02:12
(i) normal (ii) angle of incidence (iii) angle of reflection
12.3 : State laws of reflection. Describe how they can be verified graphically. 00:03:30
12.4 : Define refraction of light. Describe the passage of light through parallel-sided transparent material. 00:04:25
12.5 : Define the following terms used in refraction: 00:06:35
(i) angle of incidence (ii) angle of refraction
12.6 : What is meant by refractive index of a material? How would you determine the refractive index of a rectangular glass slab? 00:07:10
12.7 : State the laws of refraction of light and show how they may be verified using rectangular glass slab and pins. 00:08:40
12.8 : What is meant by total internal reflection. 00:11:05
12.9 : state the conditions for total internal reflection. 00:14:40
12.10 : What is critical angle? Derive a relationship between the critical angle nd the refractive index of a substance . 00:15:15
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10th Chemistry Solved Exercise Short Questions
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