Light Test

Result

Light Test - 6

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Weekly Quiz Competition

Question 1
1 / -0

Rajan moves towards a plane mirror with a speed of 8 m/s. Then, he sees his image to be moving towards him with a speed of

A
4 m/s

B
8 m/s

C
16 m/s

D
32 m/s
Question 2
1 / -0

The rear view mirror used in a car is

A
convex

B
plane

C
concave

D
None of these

Solution

Convex mirrors are commonly used as rear-view mirrors in vehicles because they give erect, virtual, full size, and diminished images of distant objects with a wider field of view.
Question 3
1 / -0

The image formed by convex lens is virtual when the object is placed

A
at focus

B
at infinity

C
between f and 2f

D
between the pole and its focus
Question 4
1 / -0

In the case of a concave mirror the image coincides with the object, when the object is placed at

A
infinity

B
focus

C
centre of curvature

D
at any point
Question 5
1 / -0

To see very small objects (which are not visible to naked eyes) we can use

A
periscope

B
telescope

C
microscope

D
stethoscope
Question 6
1 / -0

In a compound microscope, focal length of the eye piece is

A
greater than that of the objective

B
smaller than that of the objective

C
equal to that of the objective

D
half of the objective
Question 7
1 / -0

Which of the following has the shortest wavelength in visible spectrum?

A
Blue light

B
Red light

C
Yellow light

D
Violet light
Question 8
1 / -0

Which of following will be true, when light travels in water?

A
Red light travels faster than blue light.

B
Blue light travels faster than red light.

C
Velocity of light is same for all colours.

D
Colour has nothing to do with this process.
Question 9
1 / -0

A 5 ft tall man wishes to see his full image in a plane mirror. The minimum height of plane mirror needed for this purpose is

A
5 m

B
10 m

C
1.5 m

D
7.5 m

Solution

5 ft is equivalent to 1.524m

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Re-Attempt Weekly Quiz Competition

Light Test - 6

Result

Light Test - 6

Score

-

Rank

-

SHARING IS CARING

Question 1

4 m/s

8 m/s

16 m/s

32 m/s

Question 2

convex

plane

concave

None of these

Solution

Question 3

at focus

at infinity

between f and 2f

between the pole and its focus

Question 4

infinity

focus

centre of curvature

at any point

Question 5

periscope

telescope

microscope

stethoscope

Question 6

greater than that of the objective

smaller than that of the objective

equal to that of the objective

half of the objective

Question 7

Blue light

Red light

Yellow light

Violet light

Question 8

Red light travels faster than blue light.

Blue light travels faster than red light.

Velocity of light is same for all colours.

Colour has nothing to do with this process.

Question 9

5 m

10 m

1.5 m

7.5 m

Solution

User

Question Analysis

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