1.
Which of the following produces absorption spectrum?
2.
The graph of KE vs frequency in photoelectric effect is a straight line because:
3.
Dark lines in absorption spectrum occur because:
4.
A spectrograph containing prism splits light due to:
5.
Which one forms a continuous spectrum?
6.
Which instrument disperses light into its component wavelengths?
7.
Emission spectrum lines originate due to:
8.
An absorption spectrum is the inverse of:
9.
Continuous spectrum merges because:
10.
Line spectra are due to:
11.
A hot glowing gas produces what type of spectrum?
12.
Which colour has maximum wavelength in visible spectrum?
13.
Spectroscope is used to:
14.
Continuous spectrum is obtained when:
15.
Continuous spectrum of VIBGYOR is produced when:
16.
The photoelectric effect fails when:
17.
Which property distinguishes absorption and emission spectral lines?
18.
A cool gas in front of a hot source gives:
19.
Emission spectrum occurs when electrons:
20.
The spectrum produced by a glowing tungsten filament is:
21.
Which region of EM spectrum shows maximum absorption lines in molecules?
22.
Absorption spectrum is produced when light passes through:
23.
Which is true for absorption spectrum?
24.
Emission spectrum is produced when atoms:
25.
Line spectra are observed in which state?
26.
If the threshold wavelength is 500 nm, what happens when light of 600 nm falls on the metal?
27.
Which type of spectrum is produced by sunlight passing through the Earth’s atmosphere?
28.
The threshold frequency depends on:
29.
Dark lines in the solar spectrum are called:
30.
Absorption spectrum contains:
32.
A hydrogen discharge tube produces:
33.
The slope of KE vs frequency graph in photoelectric effect gives:
34.
Emission spectrum shows:
35.
What happens to the number of photoelectrons when intensity is doubled at same frequency?
36.
Which spectrum is unique for each element?
37.
In photoelectric effect, the graph of KE vs intensity is:
38.
Which radiation is not seen in visible spectrum?
39.
Continuous spectrum lacks:
40.
Band spectrum is usually produced by:
41.
Which radiation produces the largest number of spectral lines?
42.
Continuous spectrum from the sun is due to:
43.
A cool gas in front of a hot source produces dark lines because:
44.
Spectrum is defined as:
45.
Emission spectrum appears due to:
