MEDIUM
10th CBSE
IMPORTANT
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A concave mirror produces three times magnified image on a screen if the object is placed 20 cm in front of the mirror, how far is the screen from the object?

Important Questions on Light Reflection and Refraction - Natural Phenomena

MEDIUM
10th CBSE
IMPORTANT
New Millennium Science Super Simplified Physics CLASS X>Chapter 1 - Light Reflection and Refraction - Natural Phenomena>UNSOLVED NUMERICALS FOR PRACTICE>Q 1
A ray of light travelling in air strikes a glass slab at an angle of 30°. Calculate the angle of refraction if the refractive index of glass is 1.5.
MEDIUM
10th CBSE
IMPORTANT
New Millennium Science Super Simplified Physics CLASS X>Chapter 1 - Light Reflection and Refraction - Natural Phenomena>UNSOLVED NUMERICALS FOR PRACTICE>Q 2
A ray of light travelling in air strikes the water surface at an angle of 40°. Calculate the refractive index of water if the angle of refraction is 29°.  
EASY
10th CBSE
IMPORTANT
New Millennium Science Super Simplified Physics CLASS X>Chapter 1 - Light Reflection and Refraction - Natural Phenomena>UNSOLVED NUMERICALS FOR PRACTICE>Q 3
The velocity of light in air is 3×108 m s-1 and velocity of light in glass slab is 2×108 ms-1. Find the refractive index of glass.
EASY
10th CBSE
IMPORTANT
New Millennium Science Super Simplified Physics CLASS X>Chapter 1 - Light Reflection and Refraction - Natural Phenomena>UNSOLVED NUMERICALS FOR PRACTICE>Q 4
Light enters from air into a diamond which has a refractive index of 2.42. Calculate the speed of light in a diamond. The speed of light in air is 3.0×108 m s-1.
EASY
10th CBSE
IMPORTANT
New Millennium Science Super Simplified Physics CLASS X>Chapter 1 - Light Reflection and Refraction - Natural Phenomena>UNSOLVED NUMERICALS FOR PRACTICE>Q 5
Light enters from air into water which has a refractive index of 1.33. Calculate the speed of light in water. The speed of light in air is 3.0×108 m s-1.
MEDIUM
10th CBSE
IMPORTANT
New Millennium Science Super Simplified Physics CLASS X>Chapter 1 - Light Reflection and Refraction - Natural Phenomena>UNSOLVED NUMERICALS FOR PRACTICE>Q 1
A needle 10 cm high is placed at 40 cm from a convex lens of focal length 15 cm. Find position, nature and size of image. Also draw ray diagram.
MEDIUM
10th CBSE
IMPORTANT
New Millennium Science Super Simplified Physics CLASS X>Chapter 1 - Light Reflection and Refraction - Natural Phenomena>UNSOLVED NUMERICALS FOR PRACTICE>Q 2
A 5 cm high object is placed at a distance of 10 cm from a convex lens of focal length 15 cm. By drawing a ray diagram, find position, nature and size of image.
MEDIUM
10th CBSE
IMPORTANT
New Millennium Science Super Simplified Physics CLASS X>Chapter 1 - Light Reflection and Refraction - Natural Phenomena>UNSOLVED NUMERICALS FOR PRACTICE>Q 3
A needle 4 cm high is placed in front of a lens. Image of the needle is real, inverted and 6 cm high, when the distance between the needle and its image is 20 cm. Find the focal length of lens and also write the type of this lens.