The frequency range of visible light is from 3 . 75 × 10 14 Hz to 7 . 5 × 10 14 Hz . Calculate its wavelength range. Taking speed of light 3 × 10 8 m / s .

Wave speed is the distance a wave travels in a given amount of time, such as the number of meters it travels per second. Speed of light, c = 3 × 10 8 m / s Frequency range = 3 . 75 × 10 14 Hz to 7 . 5 × 10 14 Hz Speed of light = frequency × wavelength For frequency = 3 . 75 × 10 14 Hz λ = c ϑ = 8 × 10 - 7 m = 8000 A 0 For frequency = 7 . 5 × 10 14 Hz λ = c ϑ = 4 × 10 - 7 m = 4000 A 0 Wavelength range = 4000 A 0 to 8000 A 0

E M B I B E

Selina Icse Concise Physics For Class 10>Chapter 6 - Spectrum>EXERCISE-6(A)>Q 18

EASY

10th ICSE

IMPORTANT

Earn 100

Name the seven prominent colours of the white light spectrum in order of their increasing frequencies.

Important Questions on Spectrum

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IMPORTANT

Selina Icse Concise Physics For Class 10>Chapter 6 - Spectrum>EXERCISE-6(A)>Q 19

Write the name of four colours of the spectrum (band of seven colour) of white light that have wavelength longer than blue light.

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IMPORTANT

Selina Icse Concise Physics For Class 10>Chapter 6 - Spectrum>EXERCISE-6(A)>Q 1

When a white light ray falls on a prism, the ray at its first surface suffers:

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IMPORTANT

Selina Icse Concise Physics For Class 10>Chapter 6 - Spectrum>EXERCISE-6(A)>Q 2

In the spectrum of white light by a prism, the colour at the extreme end opposite to the base of prism is: (a) violet (b) yellow (c) red (d) blue

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IMPORTANT

Selina Icse Concise Physics For Class 10>Chapter 6 - Spectrum>EXERCISE-6(A)>Q 1

Calculate the frequency of yellow light of wavelength

550 nm

. The speed of light is

3 \times 10^{8} m / s

.

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10th ICSE

IMPORTANT

Selina Icse Concise Physics For Class 10>Chapter 6 - Spectrum>EXERCISE-6(A)>Q 2

The frequency range of visible light is from

3.75 \times 10^{14} Hz

to

7.5 \times 10^{14} Hz

. Calculate its wavelength range. Taking speed of light

3 \times 10^{8} m / s

.

MEDIUM

10th ICSE

IMPORTANT

Selina Icse Concise Physics For Class 10>Chapter 6 - Spectrum>EXERCISE-6(A)>Q 1

Give a list of at least five radiations, in order of their increasing frequencies, which make up the complete electromagnetic spectrum. Which of the radiation mentioned here has the highest penetrating power?

EASY

10th ICSE

IMPORTANT

Selina Icse Concise Physics For Class 10>Chapter 6 - Spectrum>EXERCISE-6(A)>Q 1

Which of the following radiation has the highest penetrating power: Infrared waves, Visible light, Ultraviolet, X-rays and Gamma rays?

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IMPORTANT

Selina Icse Concise Physics For Class 10>Chapter 6 - Spectrum>EXERCISE-6(A)>Q 2

Arrange the following radiations in the order of their increasing wavelength:
X-rays, infrared rays, radio waves, gamma ray and microwaves.