The human eye and the colourful world Worksheet-3
A. violet B. red C. yellow D. green
A. pure spectrum B. impure spectrum
A. 4000 – 8000 Å B. 2000 Å – 4000 Å
C. 10000 – 20000 Å D. none of these
A. true B. false
A. violet B. red C. yellow D. green
A. red B. violet C. green D. yellow
A. red B. violet C. indigo D. blue
A. reflection B. refraction
C. diffraction D. change in direction of light.
A. B. C. D.
A. B. C. D.
A. n = 2 B. n = 1 C. n = 4 D. n = –4
A. scattering of light B. reflection of light
C. refraction of light D. diffraction of light.
where λ is wavelength of incident light.
A. x ≈ λ B. x > λ C. x >> λ D. x << λ
A. Red colour is least scattered.
B. Blue colour is least scattered.
C. Red colour is scattered the most.
D. All colours are equally scattered.
A. reflection B. dispersion
C. atmospheric refraction D. none of these
Answer Key:
Explanation: Red colour has largest wavelength and hence the minimum frequency.
Explanation: The broad wavelength range of visible spectrum is 4000 Å – 8000 Å.
Explanation:
Explanation: Red colour is at the upper end of the spectrum. It suffers least deviation.
Explanation: Scattering of light involves change in direction of light on striking a scatterer.
Explanation: Amplitude of scattered light,
Explanation:
Explanation:
Explanation:
Explanation: For Rayleigh elastic scattering, x << λ
Explanation: As wavelength λ of red colour is largest and therefore, red colour is least scattered. It enters into our eyes and the sun looks reddis