MEDIUM
10th CBSE
IMPORTANT
Earn 100

Draw a ray diagram to show the passage of two rays of light through a rectangular slab of glass, when the angle of incidence is zero in one case and a little less than 90° in other case.

Important Questions on Light - Reflection and Refraction

EASY
10th CBSE
IMPORTANT
Core Science Physics>Chapter 1 - Light - Reflection and Refraction>Practice Problems : 4>Q 1
Calculate the focal length of a lens of power -2.75 D.
EASY
10th CBSE
IMPORTANT
Core Science Physics>Chapter 1 - Light - Reflection and Refraction>EXERCISE - 1D>Q 3
Define the following with reference to a concave lens:
The principal focus.
EASY
10th CBSE
IMPORTANT
Core Science Physics>Chapter 1 - Light - Reflection and Refraction>EXERCISE - 1D>Q 1
Draw neat ray diagrams for a convex lens and state the characteristics of the image when the object is in between the optical centre and F1.
EASY
10th CBSE
IMPORTANT
Core Science Physics>Chapter 1 - Light - Reflection and Refraction>EXERCISE - 1D>Q 3
From which position of the object does a convex lens form virtual and erect image? Explain with the help of ray diagram.
EASY
10th CBSE
IMPORTANT
Core Science Physics>Chapter 1 - Light - Reflection and Refraction>EXERCISE - 1D>Q 4

Draw ray diagrams to represent the nature, position and relative size of the image formed by a convex lens for an object placed at 2F1.

HARD
10th CBSE
IMPORTANT
Core Science Physics>Chapter 1 - Light - Reflection and Refraction>EXERCISE - 1D>Q 6
A ray of light incident on an equilateral glass prism shows minimum deviation of 30°. Calculate the speed of light through the glass prism.
MEDIUM
10th CBSE
IMPORTANT
Core Science Physics>Chapter 1 - Light - Reflection and Refraction>EXERCISE - 1D>Q 1
One half of the convex lens of focal length 20 cm is covered with black paper. Show the formation of an image of an object placed at 2F1 of such a covered lens, with the help of a key diagram. 
HARD
10th CBSE
IMPORTANT
Core Science Physics>Chapter 1 - Light - Reflection and Refraction>EXERCISE - 1D>Q 1
One half of convex lens of focal length 20 cm is covered with black paper. How will be the intensity of image formed by a half covered lens as compared with non-covered lens?