Tag: light and shadow

Questions Related to light and shadow

The speed at which the current travels in a conductor, is nearly.

evs light and shadow dual nature of light nature and sources of light theories on light

  1. $3 \times 10^4 ms^{-1}$

  2. $3 \times 10^5 ms^{-1}$

  3. $4 \times 10^6 ms^{-1}$

  4. $3 \times 10^8 ms^{-1}$

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Correct Option: D
Explanation:

The speed of the current in the conductor is the same as the speed of light in the vacuum which is $3\times 10^{8} {\dfrac{m}{s}}$

By corpuscular theory of light, the phenomenon which can be explained is ____________.

evs light and shadow dual nature of light nature and sources of light theories on light

  1. refraction

  2. diffraction

  3. interference

  4. polarisation

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Correct Option: A
Explanation:

Refraction

According to newton, when corpuscles approach the refracting surface , they are attracted near the surface. When they enter the denser medium from a rarer medium, their speed increases and hence change their direction.

Light, like sound, cannot pass through vacuum. State whether true or false

evs light and shadow dual nature of light nature and sources of light theories on light

  1. True

  2. False

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Correct Option: B
Explanation:

Light is a form of energy which doesn't need any medium to propagate.Whereas sound travels via disturbances in the medium.

Light travels in a ________ path

evs light and shadow dual nature of light nature and sources of light theories on light

  1. rectilinear

  2. zig zag

  3. circular

  4. helical

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Correct Option: A
Explanation:

Light travels in straight line unless it passes through a change in medium.

State whether true or false.
Light is a form of energy that causes a sensation of smell.

evs light and shadow dual nature of light nature and sources of light theories on light

  1. True

  2. False

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Correct Option: B
Explanation:

Smell sensation is due to chemical present in our atmosphere.

State whether true or false.
The shadow formed by a red opaque object is red in colour.

physics light and shadow substances which allow light to pass through and those which do not transparent, opaque and translucent objects shadows

  1. True

  2. False

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Correct Option: B
Explanation:

A shadow is a dark area where light from a light source is blocked by an opaque object. It occupies all of the three-dimensional volume behind an object with light in front of it. Hence the shadow formed by any color opaque object will be black only.

Transparent objects:

physics light and shadow substances which allow light to pass through and those which do not transparent, opaque and translucent objects shadows

  1. do not let light pass through them

  2. allow light to pass through them

  3. absorb some amount of light and allow the remaining to pass through them

  4. reflect all the amount of light falling on them

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Correct Option: B
Explanation:

Property of light.

Water is

physics light and shadow substances which allow light to pass through and those which do not transparent, opaque and translucent objects shadows

  1. Transparent

  2. Translucent

  3. Opaque

  4. Polymer

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Correct Option: A
Explanation:

Transparent objects allow the light to pass through them. 
Water is transparent as it allows light to pass through it.

Substances that allow light to pass through them are called

physics light and shadow substances which allow light to pass through and those which do not transparent, opaque and translucent objects shadows

  1. Transparent

  2. Translucent

  3. Opaque

  4. None of these

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Correct Option: A
Explanation:

Transparent objects are those objects that allow large quantities of light to pass through them. 

Air, water and shiny glass are all examples of transparent materials.

Transparent objects.

physics light and shadow substances which allow light to pass through and those which do not transparent, opaque and translucent objects shadows

  1. do not let light to pass through them

  2. allow light to pass through them

  3. absorb some amount of light and allow the remaining to pass through them

  4. reflect all the amount of light falling on them

Show answer
Correct Option: B
Explanation:

Transparent objects allow light to pass through them. These are objects having the property of transmitting light without any appreciable scattering so that the bodies lying beyond it are seen clearly.