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# Human Eye and Colorful World

10th Class - CBSE - Physics - 1011 Questions - 0 Concepts

#### Important Questions

Q1 Assertion & Reason Medium
##### ASSERTION

Bluish colour predominates in a clear sky, since blue has a shorter wavelength and is scattered strongly.

##### REASON

Blue has the shortest wavelength among all colours.

• A. Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
• B. Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion
• C. Both Assertion and Reason are incorrect
• D. Assertion is correct but Reason is incorrect

Asked in: Physics - Human Eye and Colorful World

1 Verified Answer | Published on 07th 09, 2020

Q2 Single Correct Medium
Which of the following statement is correct?
• A. At sunset or sunrise, the suns rays have to pass through a small distance in the atmosphere.
• B. Rayleigh scattering which is proportional to $(l/\lambda)^2$
• C. Most of the blue and other shorter wavelengths are not removed by scattering.
• D. At sunset or sunrise the suns rays have to pass through a larger distance in the atmosphere.

Asked in: Physics - Human Eye and Colorful World

1 Verified Answer | Published on 07th 09, 2020

Q3 Single Correct Medium
Rising and setting sun appears to be reddish because:
• A. The sun is colder at sunrise or at sunset
• B. Diffraction sends red rays to the earth at these times
• C. Refraction is responsible for it
• D. Scattering due to dust particles and air molecules is responsible for it

Asked in: Physics - Human Eye and Colorful World

1 Verified Answer | Published on 07th 09, 2020

Q4 Single Correct Hard
The process of re-emission of absorbed light in all directions with different intensities by the atom or molecule is called ____________.
• A. Dispersion of light
• B. Reflection of light
• C. Refraction of light
• D. Scattering of light

Asked in: Physics - Human Eye and Colorful World

1 Verified Answer | Published on 07th 09, 2020

Q5 Assertion & Reason Hard
##### ASSERTION

The moon appears purely white during the day but after sunset its colour is yellowish hue.

##### REASON

The scattered blue component of white light is mixed with yellow, the colour becomes white.

• A. Assertion is True. Reason is also True and is the correct explanation of the Assertion.
• B. Assertion is True and Reason is False
• C. Assertion is False and Reason is True
• D. Assertion is True. Reason is also True but is not the correct explanation of Assertion.

Asked in: Physics - Human Eye and Colorful World

1 Verified Answer | Published on 07th 09, 2020

Q6 Single Correct Medium
Which coloured light scatters least by fog and smoke?
• A. Green
• B. Yellow
• C. Blue
• D. Red

Asked in: Physics - Human Eye and Colorful World

1 Verified Answer | Published on 07th 09, 2020

Q7 Subjective Hard
Describe the experiment conducted by Sir C.V. Raman to demonstrate Raman effect. What is the use of this effect?

Asked in: Physics - Human Eye and Colorful World

1 Verified Answer | Published on 07th 09, 2020

Q8 Single Correct Medium
At noon the sun appears white because:
• A. all the colours of the white light are scattered away.
• B. blue colour is scattered the most.
• C. red colour is scattered the most.
• D. light is least scattered.

Asked in: Physics - Human Eye and Colorful World

1 Verified Answer | Published on 07th 09, 2020

Q9 Subjective Medium
Why does the sun appear reddish early in the morning? Will this phenomenon be observed by an astronaut on the Moon? Give reason to justify your answer.

Asked in: Physics - Human Eye and Colorful World

1 Verified Answer | Published on 07th 09, 2020

Q10 Assertion & Reason Medium
##### ASSERTION

A Diamond sparkles more than a glass imitation cut to the same shape.

##### REASON

The refractive index of diamond is less than that of glass.

• A. Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
• B. Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion
• C. Both Assertion and Reason are incorrect
• D. Assertion is correct but Reason is incorrect

Asked in: Physics - Human Eye and Colorful World

1 Verified Answer | Published on 07th 09, 2020

Questions 122475
Subjects 10
Chapters 93
Enrolled Students 65