LIGHT

$A vibrant illustration showing various optical phenomena, including reflection in mirrors, refraction in lenses, and the behavior of light in different media, with a creative and educational style suitable for students.$

Light and Optics Mastery Quiz

Test your knowledge of light and optics with our engaging quiz! Covering a range of topics from reflection and refraction to lenses and mirrors, this quiz is designed for learners of all levels.

25 multiple choice questions
Instant feedback on your answers
Enhance your understanding of optical phenomena

25 Questions6 MinutesCreated by BouncingLight42

An object is placed 20cm in front of a plane mirror. The mirror is moved 2cm towards the object. The distance between the positions of the original and final images seen in the mirror is

2cm

4cm

10cm

22cm

A ray of light that strikes a plane mirror PQ at an angle of incidence of 30 degree, is reflected from the plane mirror and then strikes a second plane mirror QR placed at right angles to the first mirror. The angles of reflection at the second mirror is

30 degree

45 degree

60 degree

90 degree

An object is placed at 100mm in front of a concave mirror which produces an upright image ( erect image) > The radius of curvature of the mirror is

Less than 100mm

Between 100 mm and 200 mm

Exactly 200mm

More than 200mm

Which position of the object will produce a magnified virtual image, if a concave mirror of focal length 15cm is being used?

10cm

20cm

30cm

35cm

A concave mirror produces a magnification of +4. The object is placed

At the focus

Between focus and centre of curvature

Between focus and pole

Beyond the centre of curvature

A ray of light is travelling in a direction perpendicular to the boundary of a parallel glass slab. The ray of light:

Is refracted towards the normal

Is refracted away from the normal

Is refracted along the same path

Does not get refracted

A lens of focal length 12cm forms an erect image, three times the size of the object. The distance between the object and image is

8cm

16cm

24cm

36cm

If an object is placed 21cm from a converging lens, the image formed is slightly smaller than the object. If the object is place at a distance of 19cm from the lens, the image formed is slightly larger than the object. The approximate focal length of the lens is

20cm

18cm

10cm

5cm

Focal lenght of plane mirror is

At infinity

Zero

Negative

None of these

Image formed by plane mirror is

Real and erect

Real and inverted

Virtual and erect

Virtual and inverted

A concave mirror gives real, inverted and same size image if the object is placed

At F

At infinity

At C

Beyond C

Power of lens is -40, it focal length is

- 40m

-0.25 m

-25m

A concave mirror gives virtual, refract and enlarged image of the object but image of smaller size of the object is called

Optically rarer

Optically denser

Optical density

Refractive index

The optical phenomena, twinkling of stars, is due to

Atmospheric reflection

Total reflection

Atmospheric refraction

Total refraction

Convex lens focus a real, point sized image at focus, the object is placed

At focus

Between F and 2F

At infinity

At 2F

The unit of power of lens is

Metre

Centimetre

Diopter

Per Meter

The radius of curvature of a mirror is 20cm the focal length is

20cm

10cm

40cm

5cm

In optics which has higher refractive index is called

Optically rarer

Optically denser

Optical density

Refractive index

An object is placed at a distance between the object and image will be

0.25m

1.0m

0.5m

0.125m

The angle of incidence for a ray of light having zero reflection angle is

30 degree

45 degree

90 degree

For real object, which of the following can produce a real image ?

Plane mirror

Concave mirror

Concave lens

Convex mirror

Which of the following mirror is used by a density to examine a small cavity?

Convex mirror

Plane mirror

Concave mirror

Combination of convex and concave mirror

An object at a distance of 30cm from a concave mirror gets its image at the same point. The focal length of the mirror is

-30cm

30cm

-15cm

15cm

A concave mirror of radius 30cm is placed in water. Its focal length in air and water. Its focal length in air and water differ by

As light travels from a rarer to a denser medium it will have

Increased velocity

Decreased velocity

Decreased wavelength

Both (b) and (c)

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Light and Optics Mastery Quiz

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