Question

light reflection and refraction class 10 extra questioms

Answer 1

Q. 1. Where will the image be formed when the object is placed between the focus and the pole (infinity, pole) of the convex mirror?

Q. 2. With respect to air the refractive index of ice and that of rock salts are 1.31 and 1.54 respectively. Calculate the refractive index of rock salt with respect to ice.

Q. 3. With respect to air the refractive index of water and that of benzene are 1.33 and 1.50 respectively. Calculate the refractive index of benzene with respect to water.

Q. 4. Wavelength of radiation 850nm falls on a surface. Will this surface be visible or not? Explain.

Q. 5. A convex mirror used on a truck has 3m radius of curvature. If a bus is located at 5m from this mirror. Find the position, nature and size of the image.

Q. 6. What is the condition under which motion pictures can be clearly seen?

Q. 7. What is accommodation? What is the maximum variation in power of accommodation in human eye?

Q. 8. An object of size 5cm is placed at a distance of 25cm from the pole of a concave mirror of radius of curvature 30cm. Cal

Q. 9. An object of size 3cm is placed at a distance of 15cm from a convex lens of focal length 10cm. Calculate the distance and size of the image so formed. What will be the nature of image?

Q. 10. Light enters from air to glass plate having refractive index 1.50. What is the speed of light if the speed of light in air is m/s? 

hope this helps you.

Answer 2

Answer:

Q ...6 too 10 is very hard