Light – Reflection and Refraction Class 10 MCQ Quiz – Test Your Understanding!

Which of the following can make a parallel beam of light when light from a point source is incident on it?

The angle of incidence from air to glass at point O on the hemispherical glass slab is _____.

No matter how far you stand from this spherical mirror, your image always appears erect. The mirror may be:

Sumati wanted to see the stars of the night sky. She knows that she needs a telescope to see those distant stars. She finds out that the telescopes, which are made of lenses, are called telescopes and the ones which are made of mirrors are called reflecting telescopes.

So she decided to make a refracting telescope. She bought two lenses L₁ and L₂ out of which L₁ was bigger and L₂ was smaller. The larger lens gathers and bends the light, while the smaller lens magnifies the image. Big, thick lenses are more powerful. So to see far away, she needed a big powerful lens. Unfortunately, she realized that a big lens is very heavy.

Heavy lenses are hard to make and difficult to hold in the right place. Also since the light is passing through the lens, the surface of the lens has to be extremely smooth. Any flaws in the lens will change the image. It would be like looking through a dirty window.

Based on the diagram shown, what kind of lenses would Sumati need to make the telescope?

Sumati wanted to see the stars of the night sky. She knows that she needs a telescope to see those distant stars. She finds out that the telescopes, which are made of lenses, are called telescopes and the ones which are made of mirrors are called reflecting telescopes.

So she decided to make a refracting telescope. She bought two lenses L₁ and L₂ out of which L₁ was bigger and L₂ was smaller. The larger lens gathers and bends the light, while the smaller lens magnifies the image. Big, thick lenses are more powerful. So to see far away, she needed a big powerful lens. Unfortunately, she realized that a big lens is very heavy.

Heavy lenses are hard to make and difficult to hold in the right place. Also since the light is passing through the lens, the surface of the lens has to be extremely smooth. Any flaws in the lens will change the image. It would be like looking through a dirty window.

Sumati bought not-so-thick lenses for the telescope and polished them. What advantages, if any, would she have with her choice of lenses?

Rays from the sun converge at a point 15 cm in front of a concave mirror. Where should an object be placed so that the size of its image is equal to the size of the object?

In the diagram shown below, a light ray is incident on a convex mirror.

Through which point will the ray travel after reflecting off the mirror?

Sumati wanted to see the stars of the night sky. She knows that she needs a telescope to see those distant stars. She finds out that the telescopes, which are made of lenses, are called telescopes and the ones which are made of mirrors are called reflecting telescopes.

So she decided to make a refracting telescope. She bought two lenses L₁ and L₂ out of which L₁ was bigger and L₂ was smaller. The larger lens gathers and bends the light, while the smaller lens magnifies the image. Big, thick lenses are more powerful. So to see far away, she needed a big powerful lens. Unfortunately, she realized that a big lens is very heavy.

Heavy lenses are hard to make and difficult to hold in the right place. Also since the light is passing through the lens, the surface of the lens has to be extremely smooth. Any flaws in the lens will change the image. It would be like looking through a dirty window.

If the powers of the lenses L₁ and L₂ are in the ratio of 4:1, what would be the ratio of the focal length of L₁ and L₂?

The below lens has a focal length of 10 cm. The object of height 2 mm is placed at a distance of 5 cm from the pole. Find the height of the image.

Rajan takes the following two photographs of the text in a book, first while keeping a circular piece of glass on the book and then while holding it at some distance above the book.

Which of the following statements is true about the piece of glass?

The figure below shows a ray of light as it travels from medium A to medium B. Refractive index of medium B relative to medium A is

Examine the below figure and state which of the following options is correct.

(one small box in the figure is equal to 1 cm)

Which of the following mirror is used by a dentist to examine a small cavity in a patient’s teeth?

Assertion (A): A convex mirror is used as a rearview/driver’s mirror.

Reason (R): Convex mirrors have a wider field of view as they are curved outwards. They also give an erect, though the diminished image.

A. Noor, a young student, was trying to demonstrate some properties of light in her science project work. She kept ‘X’ inside the box (as shown in the figure) and with the help of a laser pointer made light rays pass through the holes on one side of the box. She had a small butter paper screen to see the spots of light being cast as they emerged.

Her friend noted the following observations from this demonstration:

1.  Glass is optically rarer than air.
2.  Air and glass allow light to pass through them with the same velocity.
3.  Air is optically rarer than glass.
4. The speed of light through a denser medium is faster than that of a rarer medium.
5.  The ratio of the sin of the angle of incidence in the first medium to the ratio of the sin of the angle of refraction in the second medium gives the refractive index of the second material with respect to the first one.

Which one of the following combinations of the above statements given below is correct?