EASY
10th CBSE
IMPORTANT
Earn 100

How is the refractive index of a medium related to the speed of light? Obtain an expression for refractive index of a medium with respect to another in terms of speed of light in these two media?

Important Questions on Light : Reflection and Refraction

EASY
10th CBSE
IMPORTANT
ESSENTIALS OF PHYSICS CLASS X>Chapter 1 - Light : Reflection and Refraction>NCERT Exemplar Problems>Q 24
Refractive index of diamond with respect to glass is 1.6 and absolute refractive index of glass is 1.5. Find out the absolute refractive index of diamond.
MEDIUM
10th CBSE
IMPORTANT
ESSENTIALS OF PHYSICS CLASS X>Chapter 1 - Light : Reflection and Refraction>NCERT Exemplar Problems>Q 25
A convex lens of focal length 20 cm can produce a magnified virtual as well as real image. Is this a correct statement? If yes, where shall the object be placed in each case for obtaining these images?
MEDIUM
10th CBSE
IMPORTANT
ESSENTIALS OF PHYSICS CLASS X>Chapter 1 - Light : Reflection and Refraction>NCERT Exemplar Problems>Q 26
Sudha finds out that the sharp image of the window pane of her science laboratory is formed at a distance of 15 cm from the lens. She now tries to focus the building visible to her outside the window instead of the window pane without disturbing the lens. In which direction will she move the screen to obtain a sharp image of the building? What is the approximate focal length of this lens?
MEDIUM
10th CBSE
IMPORTANT
ESSENTIALS OF PHYSICS CLASS X>Chapter 1 - Light : Reflection and Refraction>NCERT Exemplar Problems>Q 27
How are power and focal length of a lens related? You are provided with two lenses of focal length 20 cm and 40 cm respectively. Which lens will you use to obtain more convergent light?
HARD
10th CBSE
IMPORTANT
ESSENTIALS OF PHYSICS CLASS X>Chapter 1 - Light : Reflection and Refraction>NCERT Exemplar Problems>Q 28
Under what condition in an arrangement of two plane mirrors, incident ray and reflected ray will always be parallel to each other, whatever may be the angle of incidence? Show the same with the help of diagram.
MEDIUM
10th CBSE
IMPORTANT
ESSENTIALS OF PHYSICS CLASS X>Chapter 1 - Light : Reflection and Refraction>NCERT Exemplar Problems>Q 29
Draw a ray diagram showing the path of rays of light when it enters with oblique incidence (i) from air into water; (ii) from water into air.
MEDIUM
10th CBSE
IMPORTANT
ESSENTIALS OF PHYSICS CLASS X>Chapter 1 - Light : Reflection and Refraction>NCERT Exemplar Problems>Q 30

Draw ray diagrams showing the image formation by a concave mirror when an object is placed

(a) between pole and focus of the mirror

(b) between focus and centre of curvature of the mirror

(c) at centre of curvature of the mirror

(d) a little beyond of curvature of the mirror

(e) at infinity

HARD
10th CBSE
IMPORTANT
ESSENTIALS OF PHYSICS CLASS X>Chapter 1 - Light : Reflection and Refraction>NCERT Exemplar Problems>Q 31

Draw ray diagrams showing the image formation by a convex lens when an object  is placed

(a) between optical centre and focus of the lens

(b) between focus and twice the focal length of the lens

(c) at twice the focal length of the lens

(d) at infinity

(e) at the focus of the lens