Tag: light and sight

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Questions Related to light and sight

Multiple choice physics light, shadows and images introduction to reflection of light light and sight images in plane mirror

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

  1. reflection

  2. reflex action

  3. refraction

  4. regression
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation
$ \bf{Reflection} $ is the phenomenon in which light rays on striking a polished surface(such as a mirror) bounce back or are sent back into the same medium. 

A $\bf{Reflex\ action} $ is an involuntary and nearly instantaneous movement in response to a stimulus.
 

$ \bf{Refraction} $ of light is the phenomenon of bending of light or change in the direction of light, when it passes obliquely from one transparent medium to another.

$ \bf{Regression} $ is a technique for determining the statistical relationship between two or more variables where a change in a dependent variable depends on the change in one or more independent variables.

Hence, the correct answer is OPTION A. 

Multiple choice physics light, shadows and images introduction to reflection of light light and sight images in plane mirror

The bouncing of a beam of light from a polished surface in some other direction is called -

  1. refraction

  2. reflection

  3. dispersion

  4. scattering
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

$ \bf{Refraction} $ of light is the phenomenon of bending of light or change in the direction of light, when it passes obliquely from one transparent medium to another.

$ \bf{Reflection} $ is the phenomenon in which light rays on striking a polished surface(such as a mirror) bounce back or are sent back into the same medium. 

$\bf{Dispersion} $ is the phenomenon of splitting of white light into its component colours (VIBGYOR) on passing through a glass prism.

$\bf{Scattering} $ is the phenomenon by which a beam of light is redirected or deflected in many different directions, when it passes through an imperfect medium, due to interaction with the particles of the medium.

Hence, the correct answer is OPTION B. 

Multiple choice physics light, shadows and images introduction to reflection of light light and sight images in plane mirror

According to the laws of reflection, angle of incidence is equal to angle of reflection.

  1. True

  2. False
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

According to the laws of reflection, the angle of incidence made by the incident ray with the normal must be equal to the angle of reflection made by the reflected ray with the normal i.e.  $i=r$. So, the given statement is true.

Multiple choice physics light, shadows and images introduction to reflection of light light and sight images in plane mirror

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

  1. $60^o$
  2. $30^o$
  3. $45^o$
  4. $90^o$
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

According to laws of reflection angle of incidence is equal to angle of reflection, hence of $60^{0}$ angle of incidence, angle of reflection is also $60^{0}$.

Multiple choice physics light, shadows and images introduction to reflection of light light and sight images in plane mirror

Read the given statements and select the correct option.
Statement 1: When a ray of light passes from air into water, it will bent towards the normal.
Statement 2: When light travels from air into water, its speed increases.

  1. Both statements 1 and 2 are true and statement 2 is the correct explanation of statement 1.

  2. Both statements 1 and 2 are true and statement 2 is not the correct explanation of statement 1.

  3. Statement 1 is true but statement 2 is false.

  4. Statement 1 is false but statement 2 is true.
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

When light travels from air Into water, Its speed decreases.

Multiple choice physics light, shadows and images introduction to reflection of light light and sight images in plane mirror

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

  1. Unpolished wood, covered with white cloth

  2. Polished glass of red colour

  3. Glass covered with cellophane paper

  4. Smoked glass covered with green colour cloth.
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Polished glass of red colour reflects some of the light incident on it so images of the both persons are formed on it.