EASY
10th CBSE
IMPORTANT
Earn 100

Rays from sun converge at a point 10 cm in front of a concave mirror. Where should be an object placed so that size of its image is equal to the size of the object? 

Important Questions on Light - Reflection and Refraction

EASY
10th CBSE
IMPORTANT
Science Part-I NEW ERA PHYSICS Textbook for Class X>Chapter 4 - Light - Reflection and Refraction>Test Your Self Exercise 1>Q 3
State the law of reflection.
EASY
10th CBSE
IMPORTANT
Science Part-I NEW ERA PHYSICS Textbook for Class X>Chapter 4 - Light - Reflection and Refraction>Test Your Self Exercise 1>Q 4
Define the focus of the concave mirror.
EASY
10th CBSE
IMPORTANT
Science Part-I NEW ERA PHYSICS Textbook for Class X>Chapter 4 - Light - Reflection and Refraction>Test Your Self Exercise 1>Q 5
Why a convex mirror is used as the rear-view mirror of a vehicle and not a plane mirror? 
MEDIUM
10th CBSE
IMPORTANT
Science Part-I NEW ERA PHYSICS Textbook for Class X>Chapter 4 - Light - Reflection and Refraction>Test Your Self Exercise 1>Q 6
How far an object should be placed from the pole of a concave mirror of focal length 20 cm to do a real image whose size is 1/5 the size of the object? 
MEDIUM
10th CBSE
IMPORTANT
Science Part-I NEW ERA PHYSICS Textbook for Class X>Chapter 4 - Light - Reflection and Refraction>Test Your Self Exercise 1>Q 7
A concave mirror produces three times enlarged image of an object placed at a distance 15 cm in front of it. Calculate the radius of curvature of the mirror.
MEDIUM
10th CBSE
IMPORTANT
Science Part-I NEW ERA PHYSICS Textbook for Class X>Chapter 4 - Light - Reflection and Refraction>PROBLEMS FOR PRACTICE>Q 1
A pond of depth 30 cm is filled with water of refractive index 43. Calculate apparent depth of the tank when viewed normally.
EASY
10th CBSE
IMPORTANT
Science Part-I NEW ERA PHYSICS Textbook for Class X>Chapter 4 - Light - Reflection and Refraction>PROBLEMS FOR PRACTICE>Q 2
Light travels from rarer medium 1 to a denser medium 2. The angle of incidence and refraction are respectively 45° and 30°. Calculate the refractive index of second medium with respect to the first medium.
MEDIUM
10th CBSE
IMPORTANT
Science Part-I NEW ERA PHYSICS Textbook for Class X>Chapter 4 - Light - Reflection and Refraction>PROBLEMS FOR PRACTICE>Q 3
If refractive index of glass is 1.65, what is the speed of light in glass?