Ray Optics and Optical Test

Result

Ray Optics and Optical Test - 18

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Weekly Quiz Competition

Question 1
1 / -0

Fill in the blanks:
The area of concave mirror that is exposed to incident light is called ________.

A
aperture

B
centre of curvature

C
focus

D
focal length

Solution

The area of a lens or mirror exposed to incident light is known as aperture.
Question 2
1 / -0

The magnified image from a simple microscope, by nature, is

A
real and inverted

B
virtual and inverted

C
real and erect

D
virtual and erect

Solution

The magnified image from a simple microscope is virtual and erect in nature.
Question 3
1 / -0

The image formed behind a mirror and a virtual image

A
are of same nature

B
are of different nature

C
are of same nature only in space

D
are of different nature only in space

Solution

The image formed behind a mirror is virtual in nature. So, they are of the same nature always.
Question 4
1 / -0

When a ray of light passes from a denser to a rarer medium

A
It bends away from the normal

B
It bends away from incident ray

C
It bends toward the incident ray

D
Goes parallel to the interface separating two media

Solution

When a ray of light passes from a denser to a rarer medium, some part of it gets refracted into the rarer medium such that it bends away from the normal. Some part of it gets reflected back into the denser medium. The light reflected back into the denser medium is said to be internally reflected.
Question 5
1 / -0

Banding of a stick when placed in water is because

A
rays bend away from the normal at the surface of seperation between water and the air.

B
rays bend towards the normal at the interface.

C
both

D
none

Solution

Because water is an optically denser medium than air. So these rays bend away from the normal at the surface of separation.
Question 6
1 / -0

Comparing real and virtual images, we may say that

A
Real images can not be obtained on a screen and virtual images can be

B
Virtual images can not be obtained on a screen and real images can be

C
Both real and virtual images can be obtained on a screen

D
Neither real nor virtual images can be obtained on a screen

Solution

Real images can be obtained on a screen. On-screen rays meet in real.
Virtual images can not be obtained on a screen. Because there is no meaning of screen for the virtual image.
Question 7
1 / -0

Magnifying glass forms

A
Real Image

B
Virtual Image

C
Both A and B

D
Neither A nor B

Solution

A magnifying lens is simply a convex lens and forms a magnified erect virtual image of objects.
Question 8
1 / -0

When a ray of light passes from a denser to a rarer medium, some part of it gets ....... into the denser medium

A
Reflected

B
Refracted

C
Both

D
None

Solution

When a ray of light passes from a denser to a rarer medium, some part of it gets refracted into the rarer medium such that it bends away from the normal. Some part of it gets reflected back into the denser medium. The light reflected back into the denser medium is said to be internally reflected.
Question 9
1 / -0

Fill in the blanks:
A convex lens of ______ focal length gives a greater magnification than lenses of _______ focal length.

A
short, short

B
short, long

C
long, short

D
long, long

Solution

A convex lens of short focal length gives a greater magnification than lenses of long focal length.
Question 10
1 / -0

A simple microscope has

A
2 convex lens

B
2 concave lens

C
1 convex lens

D
1 concave lens

Solution

A simple microscope is made up of a single convex lens fitted in a round metallic frame with a handle.

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Re-Attempt Weekly Quiz Competition

Ray Optics and Optical Test - 18

Result

Ray Optics and Optical Test - 18

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SHARING IS CARING

Question 1

aperture

centre of curvature

focus

focal length

Solution

Question 2

real and inverted

virtual and inverted

real and erect

virtual and erect

Solution

Question 3

are of same nature

are of different nature

are of same nature only in space

are of different nature only in space

Solution

Question 4

It bends away from the normal

It bends away from incident ray

It bends toward the incident ray

Goes parallel to the interface separating two media

Solution

Question 5

rays bend away from the normal at the surface of seperation between water and the air.

rays bend towards the normal at the interface.

both

none

Solution

Question 6

Real images can not be obtained on a screen and virtual images can be

Virtual images can not be obtained on a screen and real images can be

Both real and virtual images can be obtained on a screen

Neither real nor virtual images can be obtained on a screen

Solution

Question 7

Real Image

Virtual Image

Both A and B

Neither A nor B

Solution

Question 8

Reflected

Refracted

Both

None

Solution

Question 9

short, short

short, long

long, short

long, long

Solution

Question 10

2 convex lens

2 concave lens

1 convex lens

1 concave lens

Solution

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