Light - Reflection and Refraction
Subject matter experts of JagranJosh have developed chapter wise practice questions as per the relevancy of the chapter in the CBSE board exam. This practice set contains 10 questions with detailed explanations on “Chapter: Light - Reflection and Refraction” of Science.
Q8.A student traces the path of a ray of light passing through a rectangular slab.
For measuring the angle of incidence, he must position the protractor in the manner shown in the figure:
Q9.Four students A, B , C and D performed the experiment to determine the focal length of a concave mirror by obtaining the image of a distant tree on a screen. They measured the distances between the screen and the mirror as shown in the diagrams given below:
The correct way to measure accurate focal length of the mirror is:
Q10.A student traces the path of a ray of light passing through a rectangular slab for three different values of angle of incidence (∠i ) namely 300, 450 and 600 .He extends the direction of incident ray by a dotted line and measures the perpendicular distance ‘l’ between the extended incident ray and the emergent ray. He will observe that: