Content text 7. Refraction of light.pdf
REFRACTION OF LIGHT 10 LIGHT REFLECTION & REFRACTION Class 10th Physics (Practice Sheet) 1 When light travels from air to glass, it generally: A. Speeds up B. Slows down C. Continues at the same speed D. Gets absorbed 2 The bending of light as it passes from one transparent substance to another is known as: A. Reflection B. Absorption C. Diffraction D. Refraction 3 Which of the following phenomena is responsible for the apparent bending of a stick when it is dipped in water? A. Reflection B. Dispersion C. Diffraction D. Refraction 4 The change in speed of light when it passes from one medium to another causes a change in its: A. Frequency B. Wavelength C. Color D. Intensity 5 Which of the following optical instruments works based on the principle of refraction? A. Image formed on a screen B. Microscope C. Periscope D. Spectrometer 6 What is the speed of light in a denser medium of polarising angle 30°? 7 What is meant by the wavefront of a travelling wave? Using the Huygens principle, obtain the law of refraction at a plane interface when light passes from a denser to a rarer medium 8 When it is kept in a medium of refractive index 1.4, calculate the radius of a curvature of an equi-concave lens of refractive index 1.5 to have a power of -5D 9 What is the “refractive index” of a medium? Verify the Snell’s law of refraction when a plane wavefront is propagating from a denser to a rarer medium. 10 Show how a concave mirror can be used to obtain an erect and magnified image of an object with the help of a ray diagram. Obtain the mirror formula and expression for the linear magnification by using the above ray diagram. Page 1 Email: Phone No: Website: support@brisklearning.com +91 93299 65211 www.brisklearning.com Address: Office No. 605, CTS No. 658, Gayatri Bhuvan, A & B, Kandivali, Dattani Park, Thakur Village, Kandivali East, Mumbai, Maharashtra 400101
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