Spectrum Class 10 ICSE Physics MCQ Questions
Looking for Spectrum Class 10 ICSE Physics Chapter 6 MCQ Questions? If yes, You are the right page. Here we have provided ICSE class 10 physics chapter 6 multiple choice questions and answers. All MCQ are important.
1) Angle of deviation does not depend on
a) angle of incidence
b)size of prism
c) angle of prism
d) refractive index
Ans- option (b)
2) The refractive index of material increase then
wavelength of light
a) decrease b) increase.
c) positive. d) negative
Ans-option (a)
3) Which colour component of white light is deviated the most
a) Yellow b) orange
c) violet d)red
Any-option(c)
4) The splitting of white light into its constituent colour is known as
a) dispersion
b) refraction
c) diffraction
d) Both (a) & (b)
Ans-option (a)
5) which colour component of white light is deviated the least
a) violet b) orange
c)red d) yellow
Ans-option (c)
6) The wavelength range of red light is
a) 4460A° to 4640A°
b) 4640A°to 5000A°
c) 5920A° to 6200 A°
d) 6200 A° to 8000A°
Ans-option (d)
7) when white light ray falls on prism the ray at its second surface suffer
a) Refraction
b) Deviation
c) Dispersion
d) Both (a) & (b)
Ans-option (d)
8) The wavelength of red light is 6200A°. Find its frequency speed of light is 3×10^8m/s.
a) 4.8 x 10^15 Hz
b) 4.8 x 10^-15Hz
c) 48×10^15Hz
d)48 × 10^14Hz
Ans-option (a)
Lambada = 6200A°
=6200×10^-15m
c=3×10^8 m/s
f=c/lambada
=3 ×10^8/ 6200 × 10^-10
=0.000483 × 10^18
=4.8×10^-15 Hz
9) Which of the following has a maximum wavelength
a) Microwaves
b) radio waves
c) gamma rays
d) ultraviolet rays
Ans- option (b)
10) which of following is not electromagnetic spectrum
a) x-rays
b) radio wave
c) gamma rays
d) ultrasound waves
Ans-option(d)
11) which is incorrect for electromagnetic waves a)Electromagnetic waves require medium for propagation
b) It travel with different speeds in different medium
c) The waves are transverse in nature
d) They exhibit properties of reflection and refraction.
Ans-option (a)
12) Detection of fracture in bone used
a) ultraviolet ray
b) x-rays
c) gamma ray
d) microwaves
Ans-option(b)
13) ultraviolet ray obeys law of
a) reflection
b) refraction
c) dispersion
d)both (a) & (b)
Ans-option (d)
14) Weather forecasting uses
a) Radio waves
b) X-rays
c) Infrared ray
d) gamma ray
Ans-option (c)
15) To obtain ultraviolet spectrum which prism is required
a) quartz
b)glass
c) rock salt
d) None of these
Ans-option (a)
16) The Source of infrared ray is
a)sodium vapour lamp
b) carbon arc lamp
c)red hot iron ball
d)electric bulb
Ans-option(c)
17) which radiation is used in destroying cancer cell
a) Gamma ray
b) Infrared ray
c) UV rays
d) Radio waves
Ans-option (a)
18) The radiation which can be detected by a thermopile
a) UV radiation
b) gamma ray
c)radiowaves
d) infrared radiation
Ans-option (d)
19) When wavelength of red light is greatest then scattering is
a) more
b)less
c)greater than 1
d)zero
Ans-option (b)
20) Sea water appear blue because of
a) refraction of light
b) diffraction of light
c) Electromagnetic
d) scattering of light
Ans-option (d)
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