Ncert solutions science class 10 Solutions for Chapter 6 light reflection and refraction

The radius of curvature of a spherical mirror is 20 cm. What is its focal length?

Why is a convex mirror preffered as a rear-view mirror in vehicles?

A ray of light travelling in air enters obliquely into water. Which of the following statements are CORRECT about the bending of the light?

Light enters from air to glass having refractive index 1.50. What is the speed of light in the glass?

(Hint: Refractive index of a medium (n_m) = Speed of light in vacuum/Speed of light in the medium)

The speed of light in vacuum is 3 x 10⁸ m/s.

Table below represents material and their refractive index.

Which of the following material have highest and lowest optical density?

Kerosene, turpentine, and water are put in three different containers A, B, and C respectively. When the light enters simultaneously in all the containers then in which of the containers the light travel fastest?

Use the information given in Table

The refractive index of diamond is 2.42. Which of the following is TRUE about the light entering the diamond?

Spherical mirror and a thin spherical lens has a focal length of -15 cm. The mirror and the lens are likely to be_.

Ram wants to read small letters from the dictionary. Which of the following lens/lenses would Ram prefer to use while reading small letter from the dictionary?

Three widgets are given below.

(a) Headlights of a car

b) Side view mirror

c) Solar Furnance

Which amongst the following is an application of concave mirror?

An object is held 25 cm away from a converging lens of focal length 10 cm. What will be the characteristics of image formed?

Concave lens of focal length 15 cm forms an image 10 cm from the lens. How far is the object placed from the lens?

(Hint: Formula 1/v – 1/u = 1/f)

An object is placed at a distance of 10 cm from a convex mirror of focal length 15 cm. What is the nature of the image?

An object of size 5 cm is placed at a distance of 10 cm in front of a convex mirror of radius of curvature 30 cm. What will be the magnification value for the image formed?

(Hint: R= 2f ; Mirror formula 1/v+1/u = 1/f ; Magnification (m) = -(image distance) / (object distance))

A doctor has prescribed a corrective lens of power +2 D. What is the focal length of the lens?

(Hint: Power of lens (P) = 1/f )