Class 10 Practice - Level 2 - Light - Reflection and Refraction - Set 1

Total questions: 25

If an object is placed at the focal point of a concave mirror, the image formed will be:

Topic: Reflection of Light

At infinity

At the center of curvature

Between the focal point and the center of curvature

Between the mirror and the focal point

None

The magnification of an image formed by a plane mirror is:

Topic: Reflection of Light

Less than 1

Equal to 1

More than 1

Zero

None

In a concave mirror, if the object is moved closer to the mirror from a position beyond the center of curvature, the image will:

Topic: Reflection of Light

Move closer to the mirror and grow smaller

Move farther from the mirror and grow larger

Move closer to the mirror and grow larger

Move farther from the mirror and grow smaller

None

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

Topic: Reflection of Light

5 cm

10 cm

20 cm

40 cm

None

The image formed by a convex mirror for an object placed at infinity is:

Topic: Reflection of Light

Real and inverted

Real and erect

Virtual and inverted

Virtual and erect

None

A light ray passes from air into a glass slab with a refractive index of 1.5. If the angle of incidence is 30°, what is the angle of refraction?

Topic: Refraction of Light

19.5°

20°

25°

30°

None

Which phenomenon explains the formation of a mirage?

Topic: Refraction of Light

Reflection

Refraction

Dispersion

Scattering

None

The critical angle for total internal reflection at a glass-water interface is:

Topic: Refraction of Light

Greater than 90°

Less than 45°

Equal to 90°

Less than 90°

None

When white light passes through a prism, it splits into different colours due to:

Topic: Refraction of Light

Reflection

Refraction

Dispersion

Scattering

None

10.

A ray of light traveling in water (refractive index = 1.33) enters a glass slab (refractive index = 1.5). If the angle of incidence is 45°, the angle of refraction in the glass is:

Topic: Refraction of Light

38.8°

32.1°

33.7°

35.2°

None

11.

If an object is placed between the pole and the focal point of a concave mirror, the image formed is:

Topic: Spherical Mirrors

Real and inverted

Virtual and erect

Real and erect

Virtual and inverted

None

12.

The image formed by a concave mirror when an object is placed at the center of curvature is:

Topic: Spherical Mirrors

Real and inverted

Real and erect

Virtual and inverted

Virtual and erect

None

13.

A convex mirror has a focal length of 15 cm. The image formed by this mirror is always:

Topic: Spherical Mirrors

Real and smaller

Virtual and larger

Virtual and smaller

Real and larger

None

14.

The radius of curvature of a concave mirror is 30 cm. Where will the image be formed if an object is placed at a distance of 20 cm from the mirror?

Topic: Spherical Mirrors

At 60 cm on the same side

At 20 cm on the same side

At 20 cm on the opposite side

At 60 cm on the opposite side

None

15.

A ray of light parallel to the principal axis of a convex mirror appears to diverge from:

Topic: Spherical Mirrors

The center of curvature

The principal focus

The pole

The focal length

None

16.

A convex lens forms an image that is three times the size of the object. If the object is placed 10 cm from the lens, the distance of the image from the lens is:

Topic: Refraction by Lenses

30 cm

20 cm

15 cm

10 cm

None

17.

A concave lens of focal length 10 cm forms an image 5 cm from the lens. The object distance is:

Topic: Refraction by Lenses

15 cm

10 cm

7.5 cm

5 cm

None

18.

A lens has a power of -2.5 D. What is the focal length of the lens?

Topic: Refraction by Lenses

-4 cm

40 cm

-40 cm

25 cm

None

19.

An object is placed 10 cm from a concave lens of focal length 15 cm. The position of the image is:

Topic: Refraction by Lenses

-6 cm

-7.5 cm

-9 cm

-12 cm

None

20.

A lens has a power of -2.5 D. What is the type of lens?

Topic: Refraction by Lenses

Concave

Convex

Cylindrical

None of the above

None

21.

The condition in which the crystalline lens of the eye becomes opaque is called:

Topic: Human Eye

Myopia

Hypermetropia

Cataract

Presbyopia

None

22.

The defect of vision where the eye lens loses its flexibility with age is: Myopia

Topic: Human Eye

Myopia

Hypermetropia

Presbyopia

Astigmatism

None

23.

The far point of a person suffering from myopia is:

Topic: Human Eye

At infinity

Beyond 25 cm

Less than 25 cm

Less than infinity

None

24.

The part of the human eye that acts like a camera shutter, controlling the amount of light entering is:

Topic: Human Eye

Lens

Cornea

Retina

Iris

None

25.

The power of accommodation of the human eye is:

Topic: Human Eye

Infinite

Zero

Limited

Variable

None

1 out of 25

Time's up

Class 10 Practice - Level 2 - Light - Reflection and Refraction - Set 1

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