List of top Science Questions on Light - Reflection and Refraction

Identify from the following the ray diagram which shows the correct path of the reflected ray for the ray incident on a concave mirror as shown:

Out of the two media - Medium 1 and Medium 2, in which is the speed of light more?

Name a metal found in the earth's crust:
(i) in free state and
(ii) in the form of its compound.
State where each of these metals are placed in the reactivity series of metals

A student placed a candle flame at different distances from a convex lens and focused its image on a screen. He recorded his observation in tabular form as given below:

What is called absolute refractive index ?

The light rays travel in

Which mirror always forms an image smaller than the object?

The speed of light in air as compared to vacuum is

The focal length of a concave mirror is

Which of the following types of mirror is used in the headlight of a car ?

Which type of mirror is a concave mirror ?

A group of rays is called

If the focal length of the lens is f and power is P then

At what distance from a convex lens should an object be placed to get an image of the same size as that of the object on a screen ?

A ray of light is incident on a plane mirror at an angle of incidence of 15°. The deviation in the ray produced by the mirror is:

Assertion (A): The rainbow is a natural spectrum of sunlight in the sky.
Reason (R) : Rainbow is formed in the sky when the sun is overhead and water droplets are also present in air.

For an object, a convex mirror always forms an image which is:

The phenomena of light involved in the formation of a rainbow in the sky are

Assertion (A): Offsprings produced by asexual reproduction are genetically similar to the parents.
Reason (R): Asexual reproduction involves a single parent.

Assertion (A): Red light signals are used to stop the vehicles on the road.
Reason (R): Red coloured light is scattered the most so as to be visible from a large distance.

(a) Upper half of a convex lens is covered with a black paper. Draw a ray diagram to show the formation of image of an object placed at a distance of 2F from such a lens. Mention the position and nature of the image formed. State the observable difference in the image obtained if the lens is uncovered. Give reason to justify your answer.
(b) An object is placed at a distance of 30 cm from the optical centre of a concave lens of focal length 15 cm. Use lens formula to determine the distance of the image from the optical centre of the lens.

List four properties of the images formed by a plane mirror.