Test Details

Light, Shadows and Reflections

Dec 05, 10:05 AM

120 minutes

Dec 15, 11:00 AM

50.0 marks

MCQ

50 questions

Mastermind Institute

Classes for IX TO XII,BSc,MSc,Polytechinic,NEET,BHU,JEE,NTSE,OLYMPIAD etc

Class Details

Maths

Science

English

Class 6 CBSE

Maths

Science

English

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Question Text

Question 1 :
State whether true or false: Wood is an example of opaque object.

Question 2 :
Which of the following is the setup to make a basic pinhole camera ?

Question 6 :
If a ray of light incident on a plane mirror is such that it makes an angle of $30^{\circ}$ with the mirror, then the angle of reflection is

Question 7 :
A substance through which light can pass completely is called a/an

Question 8 :
According to the laws of reflection, ....... is equal to ........

Question 9 :
If we increase the size of the aperture (hole), of pinhole camera

Question 14 :
A medium which partially allows the light rays to pass through it is called -

Question 15 :
State the effect on the image formed by a pinhole camera if the object is moved towards the pinhole.

Question 17 :
A person looks into the mirror by placing it close to his face. The image of his face was erect, laterally inverted and of the same size. Then, the mirror must be

Question 18 :
As the object is moved away to the pinhole while pinhole camera then choosen the incorrect option

Question 19 :
A light ray makes an angle of incidence $60^o$, when it falls on a plane reflecting sheet. The angle of reflection will be.

Question 21 :
State whether true or false. Shadows, eclipses and images are formed due to the rectilinear propagation of light.

Question 24 :
The phenomenon in which light that strikes a surface is thrown back into the same medium is called -

Question 25 :
Assertion: For the sensitivity of a camera, its aperture should be reduced. Reason: Smaller the aperture image focussing is also sharp.

Question 26 :
A substance through which light can pass is called a/an :

Question 27 :
You have to cast the shadow of your pencil on the wall with the help of candle in a dark room. How can you obtain a shadow smaller in size than the pencil? [You cannot use mirrors or lenses and assume the candle to be a point source of light]

Question 30 :
At a particular time, the constant of ratio of length of a tree and the length of its shadow is found to be 1.2. Now, the length of the shadow of a flag pole is 12 m, calculate the length of the pole.

Question 32 :
A body which allows almost all the light to pass through it and does not reflect any light is a-

Question 35 :
State whether true or false. The complete dark portion of a shadow is called antumbra.

Question 37 :
How does the size of aperture affect the pinhole image ?

Question 38 :
Thin glass is a transparent body. State whether true or false.

Question 41 :
Which of the following is not a characteristic of pinhole camera ?

Question 43 :
Riya and Priya were sitting around a round table. They noticed that they could see their own and each other's image onto the table top. Then table top is made of

Question 44 :
Which of the following body allows only a part of the light to pass through it ?

Question 45 :
State whether true or false. The shadow formed by an object is always of the same size as the object.

Question 49 :
At a particular time, the constant of ratio of length of a tree and the length of its shadow is found to be $1.5$. Now, the length of the shadow of a flag pole is $15m$, calculate the length of the pole.

Question 50 :
Nisha placed a stick in the playground at 8:15 am in the morning. How will the shadow of the stick at 12:00 noon be in comparison to the one at 8:15 am?

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